Rewrite <script> src links

footer.php

<?php
// Add slash to the beginning of relative src links
function addSlashToSrc( $buffer ){
    $pattern = '/(src=[\"\'])(?!http)(?!\/\/)/us';
    $replacement = '$1/';
    return preg_replace($pattern, $replacement, $buffer);
}
ob_start( 'addSlashToSrc' );
?>

<!-- //-beg- concat_js -->
<script src="js/vanilla.js"></script>
<script src="js/parseuri.js"></script>
<script src="js/bootstrap/transition.js"></script>
<script src="js/bootstrap/affix.js"></script>
<script src="//js/bootstrap/scrollspy.js"></script>
<script src="http://js/bootstrap/tab.js"></script>
<script src="https://js/helper.js"></script>
<!-- //-end- concat_js -->

<?php
ob_end_flush();
?>

thx, dog