在后端得到的数组，打印出来是这样：
Array ( [ue_account] => li [children] => Array ( [ue_account] => ping [children] => Array ( [ue_account] => yu [children] => Array ( [ue_account] => chun [children] => ) ) ) )
，求助怎么把里面的‘ue_account’全部循环输出到前台模板？