Board Thread:Support Requests - Getting Technical/@comment-26545679-20150930231119/@comment-4731443-20151001001208

I doubt you could achieve that with mw-collapsible as provided. It would be feasible with a custom JavaScript function, but as far as I know JavaScript is still on lockdown for the most part.

You could consider tabbers, which would achieve something similar (display only one content group at a time).