function __construct() {
    parent::__construct();
    $this->load->model('example');
}

class Contact extends CI_Controller {

      public function __construct(){
        parent::__construct();
        $this->load->model('contact_model', 'contact');
      }

      public function index(){
        $data['contact'] = $this->contact->getContact();
        $this->load->view('contact', $data);
      }

      public function send_mail(){
        /* Mail configuration - ONLY USED HERE */
        $config = array('protocol' => 'mail',
                    'wordwrap' => FALSE,
                    'mailtype' => 'html',
                    'charset'   => 'utf-8',
                    'crlf'      => "rn",
                    'newline'   => "rn",
                    'send_multipart' => FALSE
                    );
        $this->load->library('email', $config);
        $records = $this->contact->getCompany();

        $this->email->from( $setmail, $records['CompanyName'] );
        $this->email->to( $to );
        $this->email->subject( $subject );
        $this->email->message( $html );
        $this->email->send();
      }

    }