You are looking at the HTML representation of the TXT format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the TXT format, set format=txt.
See the complete documentation, or API help for more information.
Array
(
    [query] => Array
        (
            [namespaces] => Array
                (
                    [-2] => Array
                        (
                            [id] => -2
                            [case] => first-letter
                            [*] => Media
                            [canonical] => Media
                        )

                    [-1] => Array
                        (
                            [id] => -1
                            [case] => first-letter
                            [*] => Special
                            [canonical] => Special
                        )

                    [0] => Array
                        (
                            [id] => 0
                            [case] => first-letter
                            [*] => 
                            [subpages] => 
                            [content] => 
                        )

                    [1] => Array
                        (
                            [id] => 1
                            [case] => first-letter
                            [*] => Talk
                            [subpages] => 
                            [canonical] => Talk
                        )

                    [2] => Array
                        (
                            [id] => 2
                            [case] => first-letter
                            [*] => User
                            [subpages] => 
                            [canonical] => User
                        )

                    [3] => Array
                        (
                            [id] => 3
                            [case] => first-letter
                            [*] => User talk
                            [subpages] => 
                            [canonical] => User talk
                        )

                    [4] => Array
                        (
                            [id] => 4
                            [case] => first-letter
                            [*] => Aino wiki
                            [subpages] => 
                            [canonical] => Project
                        )

                    [5] => Array
                        (
                            [id] => 5
                            [case] => first-letter
                            [*] => Aino wiki talk
                            [subpages] => 
                            [canonical] => Project talk
                        )

                    [6] => Array
                        (
                            [id] => 6
                            [case] => first-letter
                            [*] => File
                            [canonical] => File
                        )

                    [7] => Array
                        (
                            [id] => 7
                            [case] => first-letter
                            [*] => File talk
                            [subpages] => 
                            [canonical] => File talk
                        )

                    [8] => Array
                        (
                            [id] => 8
                            [case] => first-letter
                            [*] => MediaWiki
                            [subpages] => 
                            [canonical] => MediaWiki
                        )

                    [9] => Array
                        (
                            [id] => 9
                            [case] => first-letter
                            [*] => MediaWiki talk
                            [subpages] => 
                            [canonical] => MediaWiki talk
                        )

                    [10] => Array
                        (
                            [id] => 10
                            [case] => first-letter
                            [*] => Template
                            [canonical] => Template
                        )

                    [11] => Array
                        (
                            [id] => 11
                            [case] => first-letter
                            [*] => Template talk
                            [subpages] => 
                            [canonical] => Template talk
                        )

                    [12] => Array
                        (
                            [id] => 12
                            [case] => first-letter
                            [*] => Help
                            [subpages] => 
                            [canonical] => Help
                        )

                    [13] => Array
                        (
                            [id] => 13
                            [case] => first-letter
                            [*] => Help talk
                            [subpages] => 
                            [canonical] => Help talk
                        )

                    [14] => Array
                        (
                            [id] => 14
                            [case] => first-letter
                            [*] => Category
                            [canonical] => Category
                        )

                    [15] => Array
                        (
                            [id] => 15
                            [case] => first-letter
                            [*] => Category talk
                            [subpages] => 
                            [canonical] => Category talk
                        )

                    [1502] => Array
                        (
                            [id] => 1502
                            [case] => first-letter
                            [*] => Blog
                            [canonical] => Blog
                        )

                    [1503] => Array
                        (
                            [id] => 1503
                            [case] => first-letter
                            [*] => Blog talk
                            [canonical] => Blog talk
                        )

                    [3010] => Array
                        (
                            [id] => 3010
                            [case] => first-letter
                            [*] => Magento
                            [subpages] => 
                            [canonical] => Magento
                            [content] => 
                        )

                    [3011] => Array
                        (
                            [id] => 3011
                            [case] => first-letter
                            [*] => Magento talk
                            [canonical] => Magento talk
                        )

                    [3012] => Array
                        (
                            [id] => 3012
                            [case] => first-letter
                            [*] => HTML
                            [subpages] => 
                            [canonical] => HTML
                            [content] => 
                        )

                    [3013] => Array
                        (
                            [id] => 3013
                            [case] => first-letter
                            [*] => HTML talk
                            [canonical] => HTML talk
                        )

                    [3014] => Array
                        (
                            [id] => 3014
                            [case] => first-letter
                            [*] => Linux
                            [subpages] => 
                            [canonical] => Linux
                            [content] => 
                        )

                    [3015] => Array
                        (
                            [id] => 3015
                            [case] => first-letter
                            [*] => Linux talk
                            [canonical] => Linux talk
                        )

                    [3016] => Array
                        (
                            [id] => 3016
                            [case] => first-letter
                            [*] => Apache
                            [subpages] => 
                            [canonical] => Apache
                            [content] => 
                        )

                    [3017] => Array
                        (
                            [id] => 3017
                            [case] => first-letter
                            [*] => Apache talk
                            [canonical] => Apache talk
                        )

                    [3018] => Array
                        (
                            [id] => 3018
                            [case] => first-letter
                            [*] => CSS
                            [subpages] => 
                            [canonical] => CSS
                            [content] => 
                        )

                    [3019] => Array
                        (
                            [id] => 3019
                            [case] => first-letter
                            [*] => CSS talk
                            [canonical] => CSS talk
                        )

                    [3020] => Array
                        (
                            [id] => 3020
                            [case] => first-letter
                            [*] => Wiki
                            [subpages] => 
                            [canonical] => Wiki
                            [content] => 
                        )

                    [3021] => Array
                        (
                            [id] => 3021
                            [case] => first-letter
                            [*] => Wiki talk
                            [canonical] => Wiki talk
                        )

                    [3022] => Array
                        (
                            [id] => 3022
                            [case] => first-letter
                            [*] => PHP
                            [subpages] => 
                            [canonical] => PHP
                            [content] => 
                        )

                    [3023] => Array
                        (
                            [id] => 3023
                            [case] => first-letter
                            [*] => PHP talk
                            [canonical] => PHP talk
                        )

                    [3024] => Array
                        (
                            [id] => 3024
                            [case] => first-letter
                            [*] => JQuery
                            [subpages] => 
                            [canonical] => JQuery
                            [content] => 
                        )

                    [3025] => Array
                        (
                            [id] => 3025
                            [case] => first-letter
                            [*] => JQuery talk
                            [canonical] => JQuery talk
                        )

                    [3026] => Array
                        (
                            [id] => 3026
                            [case] => first-letter
                            [*] => WordPress
                            [subpages] => 
                            [canonical] => WordPress
                            [content] => 
                        )

                    [3027] => Array
                        (
                            [id] => 3027
                            [case] => first-letter
                            [*] => WordPress talk
                            [canonical] => WordPress talk
                        )

                    [3028] => Array
                        (
                            [id] => 3028
                            [case] => first-letter
                            [*] => NetBeans
                            [subpages] => 
                            [canonical] => NetBeans
                            [content] => 
                        )

                    [3029] => Array
                        (
                            [id] => 3029
                            [case] => first-letter
                            [*] => NetBeans talk
                            [canonical] => NetBeans talk
                        )

                    [3030] => Array
                        (
                            [id] => 3030
                            [case] => first-letter
                            [*] => Eclipse
                            [subpages] => 
                            [canonical] => Eclipse
                            [content] => 
                        )

                    [3031] => Array
                        (
                            [id] => 3031
                            [case] => first-letter
                            [*] => Eclipse talk
                            [canonical] => Eclipse talk
                        )

                    [3034] => Array
                        (
                            [id] => 3034
                            [case] => first-letter
                            [*] => PhoneGap
                            [subpages] => 
                            [canonical] => PhoneGap
                            [content] => 
                        )

                    [3035] => Array
                        (
                            [id] => 3035
                            [case] => first-letter
                            [*] => PhoneGap talk
                            [canonical] => PhoneGap talk
                        )

                    [3036] => Array
                        (
                            [id] => 3036
                            [case] => first-letter
                            [*] => CSharp
                            [subpages] => 
                            [canonical] => CSharp
                            [content] => 
                        )

                    [3037] => Array
                        (
                            [id] => 3037
                            [case] => first-letter
                            [*] => CSharp talk
                            [canonical] => CSharp talk
                        )

                    [3038] => Array
                        (
                            [id] => 3038
                            [case] => first-letter
                            [*] => NoteAttivitaSviluppo
                            [subpages] => 
                            [canonical] => NoteAttivitaSviluppo
                            [content] => 
                        )

                    [3039] => Array
                        (
                            [id] => 3039
                            [case] => first-letter
                            [*] => NoteAttivitaSviluppo talk
                            [canonical] => NoteAttivitaSviluppo talk
                        )

                    [3040] => Array
                        (
                            [id] => 3040
                            [case] => first-letter
                            [*] => MySQL
                            [subpages] => 
                            [canonical] => MySQL
                            [content] => 
                        )

                    [3041] => Array
                        (
                            [id] => 3041
                            [case] => first-letter
                            [*] => MySQL talk
                            [canonical] => MySQL talk
                        )

                    [3042] => Array
                        (
                            [id] => 3042
                            [case] => first-letter
                            [*] => VisualStudio
                            [subpages] => 
                            [canonical] => VisualStudio
                            [content] => 
                        )

                    [3043] => Array
                        (
                            [id] => 3043
                            [case] => first-letter
                            [*] => VisualStudio talk
                            [canonical] => VisualStudio talk
                        )

                    [3044] => Array
                        (
                            [id] => 3044
                            [case] => first-letter
                            [*] => MSSQL
                            [subpages] => 
                            [canonical] => MSSQL
                            [content] => 
                        )

                    [3045] => Array
                        (
                            [id] => 3045
                            [case] => first-letter
                            [*] => MSSQL talk
                            [canonical] => MSSQL talk
                        )

                    [3046] => Array
                        (
                            [id] => 3046
                            [case] => first-letter
                            [*] => XDebug
                            [subpages] => 
                            [canonical] => XDebug
                            [content] => 
                        )

                    [3047] => Array
                        (
                            [id] => 3047
                            [case] => first-letter
                            [*] => XDebug talk
                            [canonical] => XDebug talk
                        )

                    [3048] => Array
                        (
                            [id] => 3048
                            [case] => first-letter
                            [*] => Windows7
                            [subpages] => 
                            [canonical] => Windows7
                            [content] => 
                        )

                    [3049] => Array
                        (
                            [id] => 3049
                            [case] => first-letter
                            [*] => Windows7 talk
                            [canonical] => Windows7 talk
                        )

                    [3050] => Array
                        (
                            [id] => 3050
                            [case] => first-letter
                            [*] => SWUtility
                            [subpages] => 
                            [canonical] => SWUtility
                            [content] => 
                        )

                    [3051] => Array
                        (
                            [id] => 3051
                            [case] => first-letter
                            [*] => SWUtility talk
                            [canonical] => SWUtility talk
                        )

                    [3052] => Array
                        (
                            [id] => 3052
                            [case] => first-letter
                            [*] => Programmazione
                            [subpages] => 
                            [canonical] => Oracle
                            [content] => 
                        )

                    [3053] => Array
                        (
                            [id] => 3053
                            [case] => first-letter
                            [*] => Programmazione Talk
                            [subpages] => 
                            [canonical] => Oracle talk
                        )

                    [3054] => Array
                        (
                            [id] => 3054
                            [case] => first-letter
                            [*] => NavigazioneMarittima
                            [subpages] => 
                            [canonical] => MSPowerApp
                            [content] => 
                        )

                    [3055] => Array
                        (
                            [id] => 3055
                            [case] => first-letter
                            [*] => NavigazioneMarittima Talk
                            [subpages] => 
                            [canonical] => MSPowerApp talk
                        )

                    [3056] => Array
                        (
                            [id] => 3056
                            [case] => first-letter
                            [*] => Java Script
                            [subpages] => 
                            [canonical] => Java Script
                            [content] => 
                        )

                    [3057] => Array
                        (
                            [id] => 3057
                            [case] => first-letter
                            [*] => Java Script Talk
                            [subpages] => 
                            [canonical] => Java Script Talk
                        )

                    [3058] => Array
                        (
                            [id] => 3058
                            [case] => first-letter
                            [*] => Cartografia
                            [canonical] => Cartografia
                            [content] => 
                        )

                    [3059] => Array
                        (
                            [id] => 3059
                            [case] => first-letter
                            [*] => Cartografia Talk
                            [subpages] => 
                            [canonical] => Cartografia Talk
                        )

                    [3060] => Array
                        (
                            [id] => 3060
                            [case] => first-letter
                            [*] => Android
                            [subpages] => 
                            [canonical] => Android
                            [content] => 
                        )

                    [3061] => Array
                        (
                            [id] => 3061
                            [case] => first-letter
                            [*] => Android Talk
                            [subpages] => 
                            [canonical] => Android Talk
                        )

                )

        )

)