updates

templates/content_item.html

@@ -15,7 +15,7 @@
   {% endif %}
   <article>{{ content_item.html | safe }}</article>
   <div id="categories" class="row">
-    {% for category in categories %}
+    {% for category in content_item.categories %}
     <a href="{{ parent_path }}categories/{{ category }}.html" class="mx-2 small text-muted">{{ category }} </a>
     {% endfor %}
   </div>