How to remove circular links in the menu?

Question

WordPress

Website on wp, main menu code in header:

<nav class="header-nav">
              <?php $main_menu_items = wp_get_nav_menu_items('Главное меню'); ?>
              <ul class="menu">
                <?php foreach($main_menu_items as $menu_item) : ?>
                <li class="menu-item <?php echo vince_check_active_menu($menu_item);?> current_page_item">
                 
                  <?php else : ?>

                <a href="<?= $menu_item->url ?>" class="menu-item__link current_page_item"><?= $menu_item->title ?></a>

                  <?php endif; ?>
                </li>
                <?php endforeach; ?>
              </ul>
</nav>

ps I tried to write a condition like, if not on this page then , if this page is open, then . But, something doesn't work. How can you do it right? <a><span>