simplify cat/tags

_layouts/collection/collection_refpage.html

@@ -0,0 +1,42 @@
+---
+layout: content
+---
+
+{% assign all_items = "" | split: "/" %}
+{% for col_item in site[page.collection] %}
+  {% for item in col_item[page.reference] %}
+    {% assign preprocessed = item | strip %}
+    {% unless preprocessed == "" %}
+      {% assign all_items = all_items | push: preprocessed %}
+    {% endunless %}
+  {% endfor %}
+{% endfor %}
+{% assign all_items = all_items | uniq | sort %}
+
+<i class="fa fa-tag"></i>
+{% for item in all_items %}
+  {% unless tag == "" %}
+    <a class="label" href="{{ page.permalink | prepend: site.baseurl }}#{{ item | slugify }}">
+      <span class="badge">{{ item }}</span>
+    </a>
+  {% endunless %}
+{% endfor %}
+
+{% for item in all_items %}
+    {% unless item == "" %}
+    <h2 id="{{ item | slugify }}">{{ item }}</h2>
+
+    <div>
+      {% for plugin in site[page.collection] %}
+        {% assign col_items = "" | split: "/" %}
+        {% for item in plugin[page.reference] %}
+          {% assign lower_item = item %}
+          {% assign col_items = col_items | push: lower_item %}
+        {% endfor %}
+        {% if col_items contains item %}
+          {% include plugin_card.html plugin=plugin %}
+        {% endif %}
+      {% endfor %}
+    </div>
+    {% endunless %}
+{% endfor %}