Ive been messing with this all night with no solution. I am using bootstrap 2.32 (for a joomla template, not support BS3 yet), and I will have a dynamic number of list items. I
You could just move the image into the center of the list, either with the backend or with javascript:
<script> var $nav = $('.nav li'); var $middle = $nav.eq(Math.ceil($nav.length/2)); var $liWrappedImg = $('<li></li>').append($('.brand')); $middle.before($liWrappedImg); </script>