title: magento show subcategory
body: <p>HI,
  Now i get all categorys and subcategory.
  How get only subcategory?</p>
  
  <pre><code>&lt;?php foreach ($this-&gt;getStoreCategories() as $_category): ?&gt;
      &lt;?php $_menu .= $this-&gt;drawItem($_category) ?&gt;
  &lt;?php endforeach ?&gt;
  </code></pre>