Left-justified Twitter Bootstrap nav options along with right-justified; collapsible menu for mobile devices is also illustrated.

navbar-left-right.html

<!--
Navbar
Source: http://twitter.github.com/bootstrap/
-->
<div class="navbar navbar-inverse navbar-fixed-top">
    <div class="navbar-inner">
        <div class="container-fluid">
            <!-- Expand button for smaller devices -->
            <button type="button" class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
            <!-- Nav menu -->
            <div class="nav-collapse collapse">
                <!-- These links will be left-justified (Twitter Bootstrap default). -->
                <ul class="nav">
                    <li class="">
                        <a href="./index.html">Home</a>
                    </li>
                    <li class="">
                        <a href="./getting-started.html">Get started</a>
                    </li>
                    <li class="">
                        <a href="./more.html">More</a>
                    </li>
                </ul>
                <!-- These links will be right-justified. -->
                <ul class="nav pull-right">
                    <li >
                        <a href="#">Download</a>
                    </li>
                    <li class="">
                        <a href="#">Fork</a>
                    </li>
                </ul>
            </div>
        </div>
    </div>
</div>