{% capture category %}{% if post %}{{ post.categories | category_links | size }}{% else %}{{ page.categories | category_links | size }}{% endif %}{% endcapture %} {% unless category == '0' %} posted in <span class=“categories”>

{% if post %}
  {{ post.categories | category_links }}
{% else %}
  {{ page.categories | category_links }}
{% endif %}

</span> {% endunless %}