Sorunu kendi imkanlarımla çözdüm şu kodları kullanarak

<?php $page = 'PAGE NAME'; ?>

<ul>
<?php if ($page == 'home') { ?><li><a href="index.php" class="active">Home</a></li>
<?php } else { ?><li><a href="index.php">Home</a><?php } ?>

<?php if ($page == 'blog') { ?><li><a href="blog.php" class="active">Blog</a></li>
<?php } else { ?><li><a href="blog.php">Blog</a><?php } ?>

<?php if ($page == 'about') { ?><li><a href="about.php" class="active">About</a></li>
<?php } else { ?><li><a href="about.php">About</a><?php } ?>

<?php if ($page == 'contact') { ?><li><a href="contact.php" class="active">Contact</a></li>
<?php } else { ?><li><a href="contact.php">Contact</a><?php } ?>
</ul>