orbit-basic/app/views/front/show_page_sub_menu.html.erb

<% if @menu_page && @menu_page.visible_children.size > 0 %>
  <div class='category_list'>
    <!-- <h3 class='h3'><%#= @menu_page.title %></h3> -->
    <ul class='list'>
      <% @menu_page.visible_children.each do |child| %>
        <li class="<%= @page_id.eql?(child.id) ? 'active' : nil %>">
          <a href="<%= (child.class.to_s.eql?('Page') ? '/' + child.path : child.url) %>"><%= child.title %></a>
        </li>
      <% end %>
    </ul>
  </div>
<% end %>