/**
  * Retrieve parsed value
  *
  * @return array|string|int|float
  */
 public function getValueParsed()
 {
     if (!$this->hasValueParsed()) {
         switch ($this->getAttribute()) {
             case 'customer_group_condition':
                 /** @var Mage_Customer_Model_Session $customerSessionModel */
                 $customerSessionModel = Mage::getSingleton('customer/session');
                 $this->setValueParsed(array($customerSessionModel->getCustomerGroupId()));
                 break;
         }
     }
     return parent::getValueParsed();
 }