function msj_cargando() {
            $('#modalLoad').modal('show');

            $.ajax({
            url : "<?php echo base_url('index.php/reg_calls_controller/todas_calls/')?>",
            type: "POST",
            dataType: "JSON",
            success: function(data) {
                console.log(data);
                //alert(data);
                $('#modalLoad').modal('hide');
            },
            error: function (jqXHR, textStatus, errorThrown) {
                alert(textStatus);
                $('#modalLoad').modal('hide');
                swal({
                  title: "Error!",
                  text: "La conexion no fue exitosa!",
                  icon: "error",
                  button: true,
                  dangerMode: false,
                });
            }
        });

        }

public function todas_calls() {

  $sess_array = array(
    'id_user' => $this->session->userdata['sess_data']['id_user'],
    'username' => $this->session->userdata['sess_data']['username']
  );

  $data = array();
  $data['sess_data'] = $sess_array;

  $data['todas_calls']  = $this->reg_calls_model->todas_calls();

  $data['menu_higher'] = $this->load->view('elementos/menu_higher_view.php', $data, TRUE);
  $data['menu_left'] = $this->load->view('elementos/menu_left_view.php', '', TRUE);

  echo json_encode($data);

  $this->load->view("todas_calls_view.php", $data);

}