在jQuery .load()内容之后使用$ _SESSION变量

Here my index.php page structure:

<?php
    session_start();
    include("lang/".$_SESSION['lang'].".php");
?>
<!DOCTYPE html>
<html lang="en">
    <head>
        ...
    </head>
    <body>
        <a href="#" data-module="home">
        <div id="content"></div>
    </body>
    <script src="jquery.js"></script>
    <script src="script.js"></script>
</html>

I have a piece of js code to load the right clicked module.

$('a[data-module]').click(function(event) {
    event.preventDefault();
    var module = $(this).attr('data-module');
    $('#content').load('modules/' + module + '.php');
});

My problem is:
On each module page, I use $_SESSION variables. But with .load() jQuery function, it don't works anymore.

Do you have a reason for that ?

Thanks.