1<ul class="art-menu">
 2{%- for page in site.pages -%}
 3    {%- include pic-path.liquid -%}
 4    {%- assign pagedir = page.dir | remove_first: "/" | split: "/" -%}
 5    {%- if pagedir.first == "art" and pagedir.size > 1 -%}
 6    <li class="art-menu-item">
 7        <a class="art-menu-item-mask" href="{{ page.url }}">
 8            <span class="art-menu-item-text">
 9                {{ page.title }}
10            </span>
11        </a>
12        <div class="art-menu-item-img">
13            <img src="{{ artthumbs | sample }}"
14                 alt="{{ page.title }} preview">
15        </div>
16    </li>
17    {% endif %}
18{%- endfor -%}
19</ul>