title: Change the sorting direction of a single category in Magento 1.12
body: <p>I have an Magento 1.12 installation with a lot of categories. All categories are sorted descending, by changing the follow line in Toolbar.php:</p>
  
  <pre><code>public $_direction = 'desc';
  </code></pre>
  
  <p>Problem is my client want to change the direction of a single category to ascending. Does anyone know how to accomplish this?</p>
  
  <p>Many thanks.</p>