liquid template for pulling out the list of collections with jekyll. Alphabetical sort order only as of late 2017

alternate_nav.html

<--! for use with data YAML file to force order -->
{% for item in site.data.collection_nav.nav %}
  <a class="page-link" href="{{ site.baseurl }}/{{ item.url }}" alt="{{ item.title }}">{{ item.title }}</a></li>
{% endfor %}

collection_nav.html

<--! stand alone, alphabetical order -->
{% for collection in site.collections %}
{% unless collection.label == 'posts' %}
    <a class="page-link" href="{{ site.baseurl }}/{{ collection.label | remove: "_" }}">{{ collection.title }}</a>
{% endunless %}
{% endfor %}

collection_nav.yml

#Lives in _data file of jekyll site
nav_title: Full Sweep
nav:

- title: Start Here
  url: start

- title: Sweep
  url: sweep

- title: Learn
  url: learn

- title: Engage
  url: engage

- title: Relax
  url: relax