information-system/application/controllers/zodiac.php

<?php

if (!defined('BASEPATH'))
    exit('No direct script access allowed');

class Zodiac extends CI_Controller {

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

    public function index()
    {
        # code...
    }

    public function edit_zodiac()
    {
        $data['nav_view'] = $this->load->view('bootstrap/zodiac/nav', array('nav_active' => ''), true);
        $this->load->view('bootstrap/header', $data);
        $this->load->view('bootstrap/zodiac/edit',$data);
    }

}