Controller

class Sales extends CI_Controller {

    function __construct(){
    parent::__construct();
    $this->load->library('user_agent');
    }
    function index() {
    if(!$this->session->userdata('logged_in')) {
        redirect('admin/home');
    }
    // Main Page Data
    $data['sales_pages'] = $this->sales_model->getSalesPages();
    $data['cms_pages'] = $this->navigation_model->getCMSPages();
    $data['title'] = 'Sales';
    $data['content'] = $this->load->view('admin/sales', $data, TRUE);
    $this->load->view('admintemplate', $data);
}

 function addSale(){
    $this->load->view('admin/testview',  TRUE);
 }

}