Category Menu - need to generate unique link

I built a category menu in the CMS to use as my main menu. The categories and sub-categories display properly. However, the links it generates are www.domain.com?breadcrumb. I set up a specific form field in the category menu to take unique links, entitled "link." How can I get the menu to generate the link from that form field instead of the domainname.com?breadcrumb ?

Code I'm using now:

<ul>
        <?php foreach ($main_menuRecords as $categoryRecord): ?>
          <?php echo $categoryRecord['_listItemStart'] ?>
      
          <?php if ($categoryRecord['_isSelected']): ?>
            <li><a href="<?php echo $categoryRecord['_link'] ?>"><?php echo $categoryRecord['name'] ?></a></li>
          <?php else: ?>
            <li><a href="<?php echo $categoryRecord['_link'] ?>"><?php echo $categoryRecord['name'] ?></a></li>
          <?php endif; ?>
      
          <?php echo $categoryRecord['_listItemEnd'] ?>
        <?php endforeach; ?>
</ul>