i am facing problem when i am going executing
the give example of HMVC in php model the error message is

:Only variable references should be returned by reference:
and here is code

application/Conroller/test.php
<?php
class Test extends Controller {

function Test()
{
parent::Controller();
}

function index()
{


$this->load->helper('modules');
modules::run('modtest',true,'test');


// Load Module Helper
//$this->load->library("modules");

// Loading modules in a Controller
//$this->modules->load('fighters');
}
}
?>
and here is application/Module/fighters.php

<? class fighters extends Modules
{
function fighters()
{
parent::Modules();
}

function test()
{
echo "test";
}

}
?>


plz help