{% for link in site.data.navigation %}
<div class="navigation tile">
  <a href="{{ link.url }}" title="{{ link.title }}" class="post-teaser">

  {% if link.image %}
    <img src="{{ site.url }}/images{{ link.image }}" alt="teaser" class="navigation teaser" itemprop="image">
  {% endif %}

  {% if link.url contains 'http' %}
    <a href="{{ link.url }}" target="_blank"><h2 class="post-title" itemprop="name">{{ link.title }}</h2></a>
  {% else %}
    <a href="{{ site.url }}{{ link.url }}"><h2 class="post-title" itemprop="name">{{ link.title }}</h2></a>
  {% endif %}
    <p class="post-excerpt" itemprop="description">{{ link.excerpt | strip_html | truncate: 160 }}</p>

  </a>
</div><!-- /.tile -->
{% endfor %}

{% for link in site.data.navigation %}
<div class="navigation tile">
  <a href="{{ site.url }}{{ link.url }}" title="{{ link.title }}" class="post-teaser">

  {% if link.image %}
    <img src="{{ site.url }}/images{{ link.image }}" alt="teaser" class="navigation teaser" itemprop="image">
  {% endif %}

  {% if link.url contains 'http' %}
    <a href="{{ link.url }}" target="_blank"><h2 class="post-title" itemprop="name">{{ link.title }}</h2></a>
  {% else %}
    <a href="{{ site.url }}{{ link.url }}"><h2 class="post-title" itemprop="name">{{ link.title }}</h2></a>
  {% endif %}
    <p class="post-excerpt" itemprop="description">{{ link.excerpt | strip_html | truncate: 160 }}</p>

  </a>
</div><!-- /.tile -->
{% endfor %}

Add base url to icon links
Add base url to icon links
