Hi,
the problem seems to due to "mootools more" javascript library, this happen when jquery framework is called before mootools framework.
Sometimes is so difficult to fix this, you need to find where mootools is called or write a javascript function to solve this conflict, anyway there are some simple alternatives
1) Use some plugin like JQuery Easy -
http://extensions.joomla.org/extension/jquery-easy to avoid this conflict
2) Fix with simple CSS, add this line at your template CSS file:
ul.nav-tabs li a{display:block !important;}
This solve problems on tabs but maybe this conflict cause some other problems.