{% for cat in site.categories %} {% capture test %}{{cat[0] | slice: 0}}{% endcapture %} {% capture testup %}{{cat[0] | slice: 0 | upcase}}{% endcapture %}
{{cat[0]}}
{% endfor %}
{% for cat in site.categories %} {% capture test %}{{cat[0] | slice: 0}}{% endcapture %} {% capture testup %}{{cat[0] | slice: 0 | upcase}}{% endcapture %}

{{cat[0]}}

{% endfor %}