<?php
 $obj = new Mage_Catalog_Block_Navigation();
 $store_cats = $obj->getStoreCategories();
 $current_cat = $obj->getCurrentCategory();
 $current_cat = (is_object($current_cat) ? $current_cat->getName() : '');?>
 <?php foreach ($store_cats as $cat)
 { if ($cat->getName() == $current_cat) {
  echo '<li style="padding-left:5px;">
  <a href="'.$this->getCategoryUrl($cat).'">'.$cat->getName()."
  </a>n<ul>n";
 foreach ($obj->getCurrentChildCategories() as $subcat)
{ echo '<li style="padding-left:15px;">
 <a href="'.$this->getCategoryUrl($subcat).'">'.$subcat->getName()."</a>
 </li>n"; }
 echo "</ul>n</li>n"; }
else
 { echo '<li><a href="'.$this->getCategoryUrl($cat).'">'.$cat->getName()."
 </a></li>n"; }}

?>