Hi, an easy way without templating is the 3.4 top right bottom toolbar. There you can create via admin links.
Another way: take a switch for the class and when link then something like this:
<a href="{$:item.contentobject_version_object.data_map.link.content}" target="_blank" class="menu">{$:item.name|wash}</a> (You need the pure link.content from the link class, try {the variable is here|attribute(show,3)}