----------------------------------------------------------------------------------------
view
----------------------------------------------------------------------------------------


<div class="columnFull last">

  <?php $categories = $this->categoryModel->getCategor​ies(); ?>
  <?php foreach ($categories as $category):?>
  <div class="blockHead">
    <?php echo $category->cat_name ?>
  </div>
  <div class="blockBody">
    <?php $sub = $this->categoryModel->getCategor​ies($category->cat_id); ?>
    <?php foreach ($sub as $sub):?>
      <div class="blockHead top20">
        <?php echo $sub->cat_name ?>
      </div>
    <?php endforeach;?>
  </div>
  <?php endforeach;?>

</div>

------------------------------------------------------------------------------------------------------
categoryModel
------------------------------------------------------------------------------------------------------



function getCategories($category = 0)
    {
    $query = $this->db->get_where('categories'​, array('cat_parent' => $category));
        return $query->result();
    }