trustieforge/app/views/admin/_tab_has_applied_applied.erb

<div class="tabs">
  <ul>
    <li><%= link_to '未审批', {:action => 'applied_schools'},   class: "#{current_page?(unapplied_schools_path)? 'selected' : nil }" %></li>
    <li><%= link_to '已审批',  {:action => 'has_applied_schools'},  class: "#{current_page?(applied_schools_path)? 'selected' : nil }" %></li>
  </ul>
</div>