Board Thread:Support Requests - Getting Technical/@comment-3474513-20131007110955/@comment-4018164-20131007135558

This only works with version 1.18 or earlier. Wikia's MediaWiki version is 1.19.7, therefore, this collapsing table cannot work.

Instead check the examples in Help:Collapsing and see if you can find something that you find useful. In addition, ShowHide alows creating collapsible content.