PHP Version < 5.4 :
$menus = array('中','国'); $jsonStr = preg_replace_callback('/\\\u[0-9a-f]{4}/', function($matches){ return json_decode('"'.$matches[0].'"'); }, json_encode($menus));
PHP Version >= 5.4 :
$menus = array('中','国'); $jsonStr = json_encode($menus, JSON_UNESCAPED_UNICODE);