bagaimana cara mengambil satu data dari data base di codeigniter??

jika ngambil semua data kan kaya gini.. di bagian modelnya

 <?php
/**
*
*/
class Kata_motifasi extends CI_Model
{

	function __construct()
	{
		# code...
		$this->load->database();
	}

	function get_Kata_mutiara()
	{
		# code...
		$query = $this->db->get('kata_motivasi');
		return $query->result_array();
	}
}

di bagian controller

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

class Home extends CI_Controller {

	   public function __construct() {
      	parent::__construct();

      	$this->load->model('kata_motifasi');
      	$this->load->helper('url_helper');
   }
	/**
	 * Index Page for this controller.
	 *
	 * Maps to the following URL
	 * 		http://example.com/index.php/welcome
	 *	- or -
	 * 		http://example.com/index.php/welcome/index
	 *	- or -
	 * Since this controller is set as the default controller in
	 * config/routes.php, it's displayed at http://example.com/
	 *
	 * So any other public methods not prefixed with an underscore will
	 * map to /index.php/welcome/<method_name>
	 * @see https://codeigniter.com/user_guide/general/urls.html
	 */
	public function index()
	{
		//$this->kata_motifasi->get_Kata_mutiara();
		$this->load->helper('url');

		$data['kata_motivasi'] = $this->kata_motifasi->get_Kata_mutiara();
		$data['title']		   = 'selamat datang';
		$this->load->view('home/header.php');
		$this->load->view('home/index.php', $data);
		$this->load->view('home/footer.php');
	}
}

nah jadi bagai mana kalau semisal saya cuma mau ngambil satu data daridatabase database?? sekian terimakasih