tags filter shopify new - group tags

gistfile1.txt

{% comment %} filters by style {% endcomment  %}
    
    {% assign tags = section.settings.tags_4 | split: ',' %}
    {% assign show-filter = false %}
    {% for tag in tags %}
    {% if collection.all_tags contains tag %}
    {% assign show-filter = true %}
    {% endif %}
    {% endfor %}
    
    {% if show-filter %}
    <h2>Filter by Style</h2>
    <ul class="subnav clearfix listitems autosort">
      {% for tag in tags %}
      {% if current_tags contains tag %}
      <li class="current">{{ tag | link_to_remove_tag: tag }}</li>
      {% elsif collection.all_tags contains tag %}
      <li>{{ tag | link_to_add_tag: tag }}</li>
      {% endif %}
      {% endfor %}
    </ul>
    {% endif %}