Get all cms pages in header dynamically Magento

  Place this code in header file below topcontainer

  <?php $collection = Mage::getModel('cms/page')->getCollection()->addStoreFilter(Mage::app()->getStore()->getId());?>
<?php  $collection->getSelect()
->where('is_active = 1'); ?>
<ul id="nav">
<?php foreach ($collection as $page): ?>
<?php $PageData = $page->getData(); ?>
<?php// print_r($PageData);?>
<?php if($PageData['identifier']!='no-route' && $PageData['identifier']!='enable-cookies' && $PageData['identifier']!='home2') { ?>
<li>
<a href="/magento/index.php/<?php echo $PageData['identifier']?>"><span><?php echo $PageData['title'] ?></span></a>
</li>
<?php } ?>
<?php endforeach; ?>
</ul>

Note change this part of code "/magento/index.php/" according to your domain