How-Tos
From Tweeki
Just add the navigational sections and elements you want to hide for anonymous users to the $wgTweekiSkinHideAnon array in LocalSettings.php, e.g.
$wgTweekiSkinHideAnon = array( 'navbar' );
You can either use Mediawiki's default mechanisms or you can add your own link or any navigational section or element by placing it in Mediawiki:Tweeki-footer.