title: How to show All (product) Categories List in admin side: Magento
body: <p>I want to show All Product Categories in admin side of My module in System.xml as a multiselect.</p>
  
  <pre><code>$_category = Mage::getModel('catalog/category')-&gt;load();
  $collection = Mage::getModel('catalog/category')-&gt;getCategories($_category-&gt;entity_id);
  $helper = Mage::helper('catalog/category');
  
  foreach($collection as $cat){
      if($_category-&gt;getIsActive()){
           $cur_category = Mage::getModel('catalog/category')-&gt;load($cat-&gt;getId());                       
           $helper-&gt;getCategoryUrl($cat);
           echo $cat-&gt;getName();
      } 
  } 
  </code></pre>
  
  <p>But it will not show what i am want, i want only product categories.... Can some one idea about it... Thanx.</p>