adding sub wiki list into page

I am trying to add a listing of the subwikis onto a parent wiki page. I did a long time ago and now want to do it again and I can't seem to figure out how I did it! Your http://hitchhikersguide.teatra.de/guide/history-of-tea/ sample shows this - but the login/register area is not functioning so I cannot get in to see how it was done. Can you please offer some guidance?