Live search with JSON (Codeigniter)

Live search with JSON (Codeigniter)

Hi, 
I have a problem with $.getJSON function. I am using Codeigniter.
My main problem is in view. In console, when typing in search input, I get error 403 forbiden, but variable $test is geting json parameters from database. I am a beginner in jquery.

Main goal for this is to make a live search with json.

Thanks in advance for any help.

Controller code:

  2. class Test extends CI_Controller{  
  3. public function index()
  4.     {
  5.     $data['test'] = $this->Test_model->get('id', 'DESC', 10);

  7.         $this->load->view('home/inc/header_view');
  8.         $this->load->view('home/test',$data);
  9.         $this->load->view('home/inc/footer_view');
  10.     }
  11. }

Model code:

  2. <?php
  3. class Test_model extends CI_Model {
  4.  public function get($order_by = null, $sort = 'DESC', $limit = null, $offset = 0) {

  6.         $this->db->select('*');
  7.         $this->db->from('prevoznici');

  9.         if ($limit != null){
  10.             $this->db->limit($limit, $offset);
  11.         }
  12.         if ($order_by != null){
  13.             $this->db->order_by($order_by, $sort);
  14.         }
  15.         $query = $this->db->get();
  16.  return json_encode($query->result());
  17.     }
  18. }

Code in view:

  2. <div id="searcharea">
  3.             <label for="search">Search</label>
  4.             <p>Enter name</p>
  5.         <input id="search" type="search" name="search" placeholder="Name or info">
  6.     </div>
  7.         <div id="update"></div>
  8.                
  9.         <script src="<?=  site_url()?>public/js/jquery.js"></script>
  10.         <script src="<?=  site_url()?>public/js/jqueryjsonp.js"></script>
  11.         <script type="text/javascript">
  12.         
  13.         $('#search').keyup(function(){
  14.     var searchField = $('#search').val();
  15.     var myExp = new RegExp(searchField, "i");
  16.     var json = '<?= $test;?>';
  17.     $.getJSON(json, function(data){
  18.             var output = '<ul class="searchresults" >';

  20.                 $.each(data, function(key, val){
  21.                     if((val.naziv.search(myExp) != -1) || (val.datum.search(myExp) != -1))
  22.                         {
  23.                             output += '<li>';
  24.                             output += '<h2>' + val.naziv + '</h2>';
  25.                             output += '<p>' + val.datum + '</p>';
  26.                             output += '</li>';
  27.                         }
  28.                 });

  30.             output += '</ul>';
  31.             $('#update').html(output);
  32.     }).error(function() { alert("error"); });
  33. });
  34. </script>