/**
  * 获取多个经纪人的信息
  *
  * @param array $brokerIds
  * @param array $fields
  * @return array
  */
 public static function getMultiBrokerInfo($brokerIds, $fields = array())
 {
     if (!empty($fields)) {
         $fields = array_unique(array_merge($fields, array('brokerId')));
     }
     $brokerInfoList = Model_Broker_AjkBrokerExtend::getMultiBrokerInfo($brokerIds, $fields);
     if (empty($brokerInfoList)) {
         return array();
     }
     $ret = array();
     foreach ($brokerInfoList as $brokerInfo) {
         $ret[$brokerInfo['brokerId']] = $brokerInfo;
     }
     return $ret;
 }