LanguageLoader.php

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

class LanguageLoader {

  public function initialize() {
    $ci =& get_instance();
    $ci->load->helper('language');
    $siteLang = $ci->session->userdata('site_lang');
    if ($siteLang) {
      $ci->lang->load('information', $siteLang);
    } else {
      $ci->lang->load('information','english');
    }
  }
}