seperate your page from nav bar.
pageOne.php:
$page="one";
include("navigation.php");
navigation.php
if($page=="one"){$oneIsActive = 'class="active"';}else{ $oneIsActive=""; }
if($page=="two"){$twoIsActive = 'class="active"';}else{ $twoIsActive=""; }
if($page=="three"){$threeIsActive = 'class="active"';}else{ $threeIsActive=""; }
<ul class="nav">
<li <?php echo $oneIsActive; ?>><a href="pageOne.php">One</a></li>
<li <?php echo $twoIsActive; ?>><a href="pageTwo.php"><a href="#">Page 2</a></li>
<li <?php echo $threeIsActive; ?>><a href="pageThree.php"><a href="#">Page 3</a></li>
</ul>
I found that I could also set the title of my pages with this method as well.
$page="one";
$title="This is page one."
include("navigation.php");
and just grab the $title var and put it in between the "title" tags. Though I am sending it to my header page above my nav bar.