Board Thread:Support Requests - Getting Technical/@comment-7159954-20130806182806/@comment-4018164-20130806194533

You can use the content from MediaWiki:Wikiamobile-menu in the RuneScape Wiki (add its content to the same page in your wiki) and follow the instructions in MediaWiki talk:Handheld.css.

You can use it to hide elements with certain classes. They recommend only adding codes if they are extremely needed to prevent loading time.