Unnamed

	function list_categories()	{			$options = array();		//select all parent categories first		$query = $this->db->get_where("category",array('parent' => 0));		if( $query->num_rows() <= 0 )			return "<option value='0'>None</option>";					foreach( $query->result() as $row )		{			$options[] = "<option value='{$row->id}'>->  {$row->name}</option>";						$subquery = $this->db->get_where("category",array('parent' => $row->id ));						if( $subquery->num_rows() <= 0 )				return implode("",$options);						foreach( $subquery as $subrow )			{				$options[] = "<option value='{$subrow->id}'>---{$subrow->name}</option>";				$subsubquery = $this->db->get_where("category",array('parent' => $subrow->id ));								if( $subsubquery->num_rows() <= 0 )					return implode("",$options);									foreach( $subsubquery as $subsubrow )				{					$options[] = "<option value='{$subsubrow->id}'>-----{$subsubrow->name}</option>";								}			}		}		return implode("",$options);	}