Belajar TypeHead Bootstrap CI

Tamu.php

<?php
class Tamu extends CI_Controller
{
    public $data;
	
	function __construct()
	{
		parent::__construct();
	}

	function cari()
	{
		$this->load->helper('url');
		$this->load->view('tamu_cari', $this->data);
	}
	
	function searchTamu()
	{
		$this->load->model('tamu_model');
		$nama = $this->input->post('nama');
		$limit = $this->input->post('limit');
		$getTamu = $this->tamu_model->cariTamu($nama, $limit);
		$res = array();
		if(!empty($getTamu))
		{
			foreach($getTamu->result() as $row)
			{
				$res[] = array('label' => $row->id, 'value' => $row->nama);
			}
		}
		else
		{
			$res[] ="";
		}
		
		echo json_encode($res);
	}
}

?>