gistfile1.js

  function preRender(data) {
    _.each(data, function (el, key) {
      if (_.isObject(el) && el.date_type == 'datetime') {
        var date = [];
        date[0] = moment(el.value + ' ' + el.timezone_db, 'YYYY-MM-DD H:m:s z', lang);
        date[1] = moment(el.value2 + ' ' + el.timezone_db, 'YYYY-MM-DD H:m:s z', lang);
        el = date;
      }
      else if (_.isObject(el)) {
        el = preRender(el);
      }
      data[key] = el;
    });
    return data;
  }