<!DOCTYPE html>
<html>
<head>
  <title>Ads</title>
  <%= stylesheet_link_tag    "application", media: "all" %>
  <%= javascript_include_tag "application" %>
  <%= csrf_meta_tags %>
</head>
<body>
<nav class="sidebar">
  <ul class="ads">
     ADS
  </ul>
  <ul>
    <li><%= link_to 'Campaigns', admin_campaigns_path %></li>
  </ul>
  <ul>
    <li><%= link_to 'Banners', admin_banners_path %></li>
  </ul>
</nav>
<div >
  <a></a>
</div>
  <div class="center">
  <%= yield %>
  </div>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
  <title>Ads</title>
  <%= stylesheet_link_tag    'ads', media: 'all' %>
  <%= javascript_include_tag 'test' %>
  <%= csrf_meta_tags %>
</head>
<body>
  <nav class="sidebar">
    <ul class="ads">
       ADS
    </ul>
    <ul>
      <li><%= link_to t('topbar.admin'), main_app.admin_root_path %></li>
    </ul>
    <ul>
      <li><%= link_to t('activerecord.models.ads/campaign.few'), admin_campaigns_path %></li>
    </ul>
    <ul>
      <li><%= link_to t('activerecord.models.ads/banner.few'), admin_banners_path %></li>
    </ul>
  </nav>

  <div class="body-container center">
    <%= yield %>
  </div>
</body>
</html>

Add link to admin main app
Add link to admin main app
