How do I center the nav buttons?
Sorry to ask so many questions, but I'm finding Bootstrap tricky. Everything I knew how to do is now harder, it seems, and the way I knew doesn't work anymore.
Anyway -- I want to center the nav buttons (see screenshot below). I have tried everything I can think of. It would be nice if there were a property to align="center" for items, but apparently no one but me thinks it would speed things up.
Is it hidden in the Bootstrap CSS, or can I create an ID or class?

The code (without all the nav links) is:
<div class="container-fluid" id="wrapper">
<!-- Header -->
<header>
<div class="row"><img src="images/header.jpg" class="center-block image-fill" alt="Kairos Prison Ministry"></div>
</header>
<!-- Navigation -->
<nav class="navbar navbar-default dkblue col-lg-8 col-lg-offset-0">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#defaultNavbar1"><span class="sr-only">Toggle navigation</span><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></button>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse dkblue" id="defaultNavbar1">
<ul class="nav navbar-nav bg-primary">
<li> </li>
<li> </li>
<li><a href="#" class="whitetext">Home</a></li><li><a href="#" class="whitetext">Home</a></li>
<li class="dropdown"><a href="#" class="dropdown-toggle whitetext" data-toggle="dropdown" role="button" aria-expanded="false">About Us<span class="caret"></span></a>
<ul class="dropdown-menu" role="menu">
<li><a href="#">Our Core Values</a></li>
</ul>
</ul>
<!-- /.navbar-collapse -->
</div>
<!-- /.container-fluid -->
</nav>
</div>
