$title = Title::newFromText( 'Category:Template:xyz' );
$page = WikiPage::factory( $title );
$page->doEdit( 'Some text', 'inserting content' );
$title = Title::newFromText( 'Category:Template:xyz' );
$page = WikiPage::factory( $title );
$page->doEdit( 'Some text', 'inserting content' );