I made you a plunger as an example . You were very close. You just need to set the property displayin the selector .nav lito inline-block.
.nav li {
display:inline-block;
}
Bootstrap, , . Bootstrap . pull-left li.
<ul class="nav" role="navigation">
<li class="pull-left"><a href="#">About</a></li>
<li class="pull-left"><a href="#">Photography</a></li>
<li class="pull-left"><a href="#">Programming</a></li>
<li class="pull-left"><a href="#">Writing</a></li>
<li class="pull-left"><a href="#">Reading</a></li>
<li class="pull-left"><a href="#">Contact</a></li>
</ul>