From:
citys["bj"] = {bj:"Beijing"};
citys["han"] = {haikou:"Haikou",hainan:"Hainan",sanya:"Sanya",wzs:"Wuzhishan"};
To:
"bj" => array("bj"=>"Beijing");
"han" => array("haikou"=>"Haikou","hainan"=>"Hainan","sanya"=>"Sanya","wzs"=>"Wuzhishan");
Thanks!