it's about this site: http://mm-moerz.de/index.php?option=com_content&view=article&id=69&Itemid=184
On several pages my client liked to have a submenu. In January I created them by using the "nav nav-tabs" option. Everything was fine and the submenu-items ("Münstermaifeld", "Maifeld", Mosel") looked like the Bootstrap tabs (https://getbootstrap.com/docs/3.3/components/#nav-tabs). Until last week.
I guess it was after the last update of the t3 plugin. Now the submenus look like this:
(no tabs anymore). I don't think I changed anything else.
Please, would somebody take a look and point me into the right direction?
Thanks a lot in advance!