Anyone got a way to update cart items options, not just quantity?

Code:
&lt;?php



class MY_Cart extends CI_Cart

{

  function __construct()

  {

      parent::CI_Cart();

  }



  function update_all($items = array())

  {

      // Was any cart data passed?

      if ( ! is_array($items) OR count($items) == 0)

      {

          return false;

      }



      // You can either update a single product using a one-dimensional array,

      // or multiple products using a multi-dimensional one.  The way we

      // determine the array type is by looking for a required array key named "rowid".

      // If it's not found we assume it's a multi-dimensional array

      if (isset($items['rowid']))

      {

          $this->_update_item($items);

      }

      else

      {

          foreach($items as $item)

          {

              $this->_update_item($item);

          }

      }



      $this->_save_cart();

  }



  /*

   * Function: _update_item

   * Param: Array with a rowid and information about the item to be updated

   *             such as qty, name, price, custom fields.

   */

  function _update_item($item)

  {

      foreach($item as $key => $value)

      {

          //don't allow them to change the rowid

          if($key == 'rowid')

          {

              continue;

          }

          //do some processing if qty is

          //updated since it has strict requirements

          if($key == "qty")

          {

              // Prep the quantity

              $item['qty'] = preg_replace('/([^0-9])/i', '', $item['qty']);

              // Is the quantity a number?

              if ( ! is_numeric($item['qty']))

              {

                  continue;

              }

              // Is the new quantity different than what is already saved in the cart?

              // If it's the same there's nothing to do

              if ($this->_cart_contents[$item['rowid']]['qty'] == $item['qty'])

              {

                  continue;

              }

              // Is the quantity zero?  If so we will remove the item from the cart.

              // If the quantity is greater than zero we are updating

              if ($item['qty'] == 0)

              {

                  unset($this->_cart_contents[$item['rowid']]);

                  continue;

              }

          }

          $this->_cart_contents[$item['rowid']][$key] = $value;

      }

  }

}