title: Bootstrap 3 submenu parent highlight
body: <p>Submenus were removed in Bootstrap 3.  I added them back using this example/code:
  <a href="http://bootply.com/71520" rel="nofollow">http://bootply.com/71520</a></p>
  
  <p>The issue is the parent menu item does not stay highlighted as we hover over the submenu.  How can this be accomplished?  This used to work in bootstrap 2:
  <a href="http://getbootstrap.com/2.3.2/components.html#dropdowns" rel="nofollow">http://getbootstrap.com/2.3.2/components.html#dropdowns</a></p>
  
  <p>I tried looking all over the CSS and couldn't find this.</p>