var menuItems = document.querySelectorAll( ‘.dslc-navigation .menu > li.menu-item-has-children:not(.menu-with-arrow) > a’ );
for (var i = 0, len = menuItems.length; i < len; i++) {
menuItems[i].insertAdjacentHTML('afterend', '‘);
menuItems[i].parentElement.className += ” menu-with-arrow”;
}