如何在Drupal中使用自定义href属性提交webform后重定向到其他页面

I have this snippet in one of my nodes folder:

node--experience.php

At the moment, the section has a download button which holds a URL:

<?php 
  // Download Info pack (PDF)
  if($entry_info) {
    //var_dump($entry_info);
    print l('Download info pack', render($entry_info), array('attributes' => array('class' => array('btn', 'btn-border'), 'target' => '_blank'))); 
  } else {
    //print '<a title="'. $title .'" class="btn btn-solid info-pack-notify">Download info pack</a>';
  } 
?>

So, I need to open a webform once I click in the "Download info pack" button, and after form submission, the page should redirect to me to the link that is currently being held by $entry_info variable.

How can I do that?