Add HTML content to the GUI footer

Gui items are supposed to be called more than once. And so, adding script called many times may cause some bugs. That's why it's useful to append content after each cols.

Here is how you can do it.

PHP

<?php
$this->gui->col_config( 1 , array(
   		'footer-script'			=>		'<script>alert("custom")</script>'
) ); // where 1 is the col id.