zeus.ugent.be/layouts/archive_page.erb

<div class="columns" >
  <div class="column is-2 is-narrow">
    <aside class="menu">
      <p class="menu-label">
        Academiejaar
      </p>
      <ul class="menu-list">
        <% academic_years_blog_items.each do |year, item| %>
        <% if @item_rep && @item_rep.path == item.path %>
        <li>
          <a href="#" class="is-active">
            <%= pretty_year(year) %>
          </a>
        </li>
        <% else %>
        <li>
          <%= link_to pretty_year(year), item %>
        </li>
        <% end %>
        <% end %>
      </ul>
    </aside>
  </div>
  <div class="column">
    <div class="columns is-multiline">
      <div class="column">
      <% posts_in_year(item[:academic_year]).each_with_index.select {|e, i| i.even?}.map(&:first).each do |post| %>
        <%= render '/partials/_blog_preview.*', post: post %>
      <% end %>
      </div>

      <div class="column">
      <% posts_in_year(item[:academic_year]).each_with_index.reject {|e, i| i.even?}.map(&:first).each do |post| %>
        <%= render '/partials/_blog_preview.*', post: post %>
      <% end %>
      </div>
    </div>
  </div>
</div>