Controller Admin (Autocomplete)

<?php defined('BASEPATH') OR exit('No direct script access allowed');

class Admin extends CI_Controller {
 function __construct(){
        parent::__construct();
        if($this->session->userdata('id_user') <> '1'){
            redirect('login');
        }
    }
    public $layout = 'Admin/layout';

    public function index(){
        $data = array('title' => 'Admin', 'main_view' => 'Admin/home');
        $this->load->view($this->layout, $data);
    }

  public function tambahharga(){
        $data = array('title' => 'Tambah Harga', 'main_view' => 'Admin/Harga/harga_baru');
        $this->load->view($this->layout, $data);
  }

  function datareklame(){

        $keyword_reklame = $this->uri->segment(3);

        $data = $this->db->query("SELECT * from tb_reklame where nama_reklame like '%$keyword_reklame%'");

        foreach($data->result() as $row){
            $arr['query'] = $keyword_reklame%
            $arr['suggestions'][] = array(
                'value' =>$row->nama_reklame,
                'id_reklame' =>$row->id_reklame,
                'keterangan' => $row->keterangan,
                'alamat' => $row->alamat
            );
        }
        echo json_encode($arr);

    }
}