I have that div:

<div id="content"></div>

and I want to include inside PHP file using jQuery.

I try with this, but doesn't work:

var about_me = "<?php include('php/about_me.php') ?>"

$('$content').click(function(){
 $('#content').text(about_me);
});

This returns me PHP code like a string?

You could use .load:

$("#content").load('/about_me.php');

more