Use the class .navbar-right to push an element to the right within a navbar, or .pull-right to do the same when not in a navbar.
<ul class="nav nav-tabs navbar-right">
<li class="active"><a href="#">Home</a></li>
<li><a href="#">Tab1</a></li>
<li><a href="#">Tab2</a></li>
</ul>
Good to know the other helper-classes here too: http://getbootstrap.com/css/#helper-classes