orbit-basic/app/views/layouts/_left_menu.html.erb

<ul class="nav" role="navigation">

  <!-- menu -->
  <li id="orbit-start" class="dropdown">
    <a class="orbitlogo" href="#" role="button" class="dropdown-toggle" data-toggle="dropdown"></a>
    <ul class="dropdown-menu" role="menu" aria-labelledby="orbit-start">
      <li><%= link_to content_tag(:i, nil, :class => 'icons-gauge') + ' ' + t(:dashboard_), admin_dashboards_path, tabindex: '-1' %></li>
      <li><%= link_to content_tag(:i, nil, :class => 'icons-users') + ' ' + t(:member_), admin_users_new_interface_index_path, tabindex: '-1' %></li>
      <% if (is_admin? rescue false) %>
        <li class="divider"></li>
        <li><%= link_to content_tag(:i, nil, :class => 'icons-cog') + ' ' + t('site.settings'), admin_items_path, tabindex: '-1' %></li>
      <% end %>
    </ul>
  </li>

  <!-- home -->
  <li id="orbit-home">
    <a href="<%= root_path %>" role="button">
      <i class="icons-house"></i> <span class="hide"><%= t(:homepage) %></span>
    </a>
  </li>

  <!-- Desktop -->
  <li id="orbit-desktop">
    <a href="<%= desktop_path %>" role="button">
      <i class="icons-screen"></i> <span class="hide"><%= t(:desktop) %></span>
    </a>
  </li>
  
</ul>
<% @url_path = "#{request.fullpath}".scan(/admin/)%>
<% if (@site.default_image.present? && (!@url_path.include? "admin"))%>
<style>
  #orbit-bar .orbitlogo {
  width: 20px;
  height: 20px;
  background-size: 70%;
  display: inline-block;
  background-position: center;
  background-repeat: no-repeat;
  background-image: url(<%= @site.default_image %>);
  /* For Suck IE */
  background-image: url(<%= @site.default_image%>)\9;
}
</style>
<% end %>