Manual:Footer

To change the footer on your MediaWiki page, you must edit the skins PHP file. For example if you go in to MonoBook.php you will find the following code.

$footerlinks = array(			'lastmod', 'viewcount', 'numberofwatchingusers', 'credits', 'copyright',			'privacy', 'about', 'disclaimer', 'tagline',		);

In the above you can simply add and remove items from the array that you wish to appear in your footer, this must be done for each template though and remember it may take a while to update due to MediaWiki caches.