I\'m using Twitter Bootstrap and some custom css (found here) to have dropdown menus open up on mouseover.
I am using the \"caret\" on a on the root menu items to show
Just switch up the borders (see fiddle):
HTML
CSS
.caret-right { border-bottom: 4px solid transparent; border-top: 4px solid transparent; border-left: 4px solid; display: inline-block; height: 0; opacity: 0.3; vertical-align: top; width: 0; }