home-assistant.io/source/_includes/asides/categories.html

<section class="categories aside-module grid__item one-whole lap-one-half">
  <h1 class="title epsilon">{% icon "mdi:category" %} Categories</h1>
  <ul class="divided">
    {% assign categories = site.categories | sort %}
    {% for category in categories %}
      {% assign category_name = category | first | downcase %}
      {% if category_name != "core"%}
        <li><a href="/blog/categories/{{ category_name }}/">{{ category | first | replace: '-', ' '}} <span class="count">{{ category[1] | size }}</span></a></li>
      {% endif %}
    {% endfor %}
  </ul>
</section>