<ul class="sidebar-menu">
   <li class="active">
     <a href="/dashboard">
       <i class="fa fa-dashboard"></i> <span>Dashboard</span>
     </a>
   </li>
   <!-- Manage Users -->
   <li class="treeview">
     <a href="#">
       <i class="fa fa-edit"></i> <span>Manage Users</span>
       <i class="fa fa-angle-right pull-right"></i>
      </a>
         <ul class="treeview-menu">
          <li>
            <%= link_to managestudents_path, type: "button", data: {toggle: "expanding"} do %>
               <i class="fa fa-angle-double-right"></i> Students
            <% end %>
         </li>

<li class="active">
   <% link_to dashboard_path  do%>
       <i class="fa fa-dashboard"></i> <span>Dashboard</span>
   <% end %>
 </li>

<% link_to dashboard_path  do%>
   <i class="fa fa-dashboard"></i> Dashboard
<% end %>