CodeIgniter Web Services Client

[eluser]afirdaus[/eluser]
hi i change my code, i used NuSoap, and everything ok but how get result with JSON or XML format or another else with good format ?

Code:

require_once(APPPATH.'libraries/nusoap/nusoap'.EXT); //includes nusoap
         // Same as application/libraries/nusoap/nusoap.php
         $n_params = array('operation.invoke' => 'My Name', 'email' => '[email protected]');
         $client = new nusoap_client('http://services.insw.go.id/web-services/nsw');
         $result = $client->call('getListGA');
         echo $result;

i want show the result like this

ID : Result1
ID : Result2
---CUT----