app/views/layouts/_header.html.erb
<header class="navbar navbar-fixed-top navbar-inverse">
<div class="container">
<%= link_to "icccg", root_path, id: "logo" %>
<nav>
<ul class="nav navbar-nav navbar-right">
<li><%= link_to "Home", root_path %></li>
<li><%= link_to "Help", "#" %></li>
<% if user_signed_in? %>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
Account <b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><%= link_to "Profile", "#" %></li>
<li><%= link_to "Settings", "#" %></li>
<li class="divider"></li>
<li>
</li>
</ul>
<li><%= link_to "Log out", destroy_user_session_path, method: :delete %></li>
<li><a href=""><%= current_user.email %></a></li>
</li>
<% else %>
<li><%= link_to "Log in", new_user_session_path %></li>
<% end %>
</ul>
</nav>
</div>
</header>