You are looking at the HTML representation of the TXT format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information.
Array
(
    [query] => Array
        (
            [namespaces] => Array
                (
                    [-2] => Array
                        (
                            [id] => -2
                            [*] => Media
                            [canonical] => Media
                        )

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

                    [0] => Array
                        (
                            [id] => 0
                            [*] => 
                        )

                    [NS_IRCD] => Array
                        (
                            [id] => 0
                            [*] => IRCd
                            [subpages] => 
                            [canonical] => IRCd
                        )

                    [NS_IRCD_TALK] => Array
                        (
                            [id] => 0
                            [*] => IRCd talk
                            [canonical] => IRCd talk
                        )

                    [1] => Array
                        (
                            [id] => 1
                            [*] => Talk
                            [subpages] => 
                            [canonical] => Talk
                        )

                    [2] => Array
                        (
                            [id] => 2
                            [*] => User
                            [subpages] => 
                            [canonical] => User
                        )

                    [3] => Array
                        (
                            [id] => 3
                            [*] => User talk
                            [subpages] => 
                            [canonical] => User talk
                        )

                    [4] => Array
                        (
                            [id] => 4
                            [*] => DareNET Wiki
                            [canonical] => Project
                        )

                    [5] => Array
                        (
                            [id] => 5
                            [*] => DareNET Wiki talk
                            [subpages] => 
                            [canonical] => Project talk
                        )

                    [6] => Array
                        (
                            [id] => 6
                            [*] => File
                            [canonical] => File
                        )

                    [7] => Array
                        (
                            [id] => 7
                            [*] => File talk
                            [subpages] => 
                            [canonical] => File talk
                        )

                    [8] => Array
                        (
                            [id] => 8
                            [*] => MediaWiki
                            [canonical] => MediaWiki
                        )

                    [9] => Array
                        (
                            [id] => 9
                            [*] => MediaWiki talk
                            [subpages] => 
                            [canonical] => MediaWiki talk
                        )

                    [10] => Array
                        (
                            [id] => 10
                            [*] => Template
                            [canonical] => Template
                        )

                    [11] => Array
                        (
                            [id] => 11
                            [*] => Template talk
                            [subpages] => 
                            [canonical] => Template talk
                        )

                    [12] => Array
                        (
                            [id] => 12
                            [*] => Help
                            [canonical] => Help
                        )

                    [13] => Array
                        (
                            [id] => 13
                            [*] => Help talk
                            [subpages] => 
                            [canonical] => Help talk
                        )

                    [14] => Array
                        (
                            [id] => 14
                            [*] => Category
                            [canonical] => Category
                        )

                    [15] => Array
                        (
                            [id] => 15
                            [*] => Category talk
                            [subpages] => 
                            [canonical] => Category talk
                        )

                    [200] => Array
                        (
                            [id] => 200
                            [*] => Channel
                            [subpages] => 
                            [canonical] => Channel
                        )

                    [201] => Array
                        (
                            [id] => 201
                            [*] => Channel talk
                            [canonical] => Channel talk
                        )

                    [300] => Array
                        (
                            [id] => 300
                            [*] => Policy
                            [subpages] => 
                            [canonical] => Policy
                        )

                    [301] => Array
                        (
                            [id] => 301
                            [*] => Policy talk
                            [canonical] => Policy talk
                        )

                    [302] => Array
                        (
                            [id] => 302
                            [*] => Staff
                            [subpages] => 
                            [canonical] => Staff
                        )

                    [303] => Array
                        (
                            [id] => 303
                            [*] => Staff talk
                            [canonical] => Staff talk
                        )

                )

        )

)