How to Handle Jason Encoded Data in Jquery

[eluser]Shiju S S[/eluser]
My script is:

Code:

<$cript>
var base_url = "&lt;?php echo base_url();?&gt;";
$('#tags').change(function()
{
var jqxhr = $.getJSON(base_url + "franchisee_lab_investigations/get_patient_details", function(data) {
  alert(data);
})

});
</$cript>

encoding:

Code:

if($result)

  {

   foreach($result as $row):

   $data[] = array('id' => $row->c_patient_name, 'label' => $row->c_patient_name, 'value'=> $row->c_patient_name);

    endforeach;    

  }  
  echo json_encode($data);

How can I use this data to be displayed in a tag say input tag:

$('#textPatientage').val('What to add here');