<section class="aside-module grid__item one-whole lap-one-half">
  <h1 class="title delta">Categories</h1>
  <ul class="divided">
    {% assign categories = site.categories | sort %}
    {% for category in categories %}
      <li><a href="/blog/categories/{{ category | first | downcase }}/">{{ category | first | replace: '-', ' '}}</a></li>
    {% endfor %}
  </ul>
</section>