I have a header.php file that is called in all the pages. This header file contains a menu bar. The menu bar has been modified and the new item includes opening a pop-up div on click. This div reference a few css and javascript files. How can I add these files to the header considering I cannot have a head tag in the header.php file. The solution that has failed to work is:
<style>
<?php include '../../css/base.css'; ?>
</style>