<nav class=“globalnav”>

{% assign menu = site.pages | where: "menu", "main" | sort: "weight" %}
<ul>
    {% for p in menu %}
    {% if page.url == p.url %}
    <li><a class="active" href="{{ "/{{p.url}}" | prepend: site.baseurl | prepend: site.url }}">{{p.title}}</a></li>
    {% else %}
    <li><a href="{{ "/{{p.url}}" | prepend: site.baseurl | prepend: site.url }}">{{p.title}}</a></li>
    {% endif %}
    {% endfor %}
</ul>

</nav>