<string xmlns="http://tempuri.org/">
{"AirportList":[],"CityList":[{"ExtensionData":{},"Code":"ZRH","Country":{"ExtensionData":{},"CallingCode":"41","Code":"CH","CurrencyCode":"CHF","Name":"Suiza"},"CountryCode":"","Latitude":"4736902","Longitude":"853803","Name":"Zurich"}],"CountryList":[],"RegionList":null,"ExtensionData":{},"Messages":null,"SessionKey":"","Success":true}
     </string>

callAjax('POST', 'ListCitiesByNameFilter', { filter: req.term }, false, function(data) {
                                    res($.map(data, function(item) {
                                     console.log(item);
                                        var description = item.Name + ", " + "someStuff" + " (" + item.Code + ") ";
                                        return {
                                            label: description,
                                            value: description,
                                            code: item.Code
                                        }
                                    }))
                                });

res($.map(data.CallingCode, function(item)