Turn this list into a drop down?

oh, if it matters heres my whole application.html.erb

<!DOCTYPE html>

<html> <head> <title>The Midland Agg</title> <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %> <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %> <%= csrf_meta_tags %> </head> <body> <header class="navbar navbar-default" role="navigation"> <div class="navbar-inner"> <div class="container"> <div id="logo" class="navbar-brand"><%= link_to "..~The Midland Agg ~..", root_path %></div> <nav class="collapse navbar-collapse navbar-ex1-collapse">

        <% if user_signed_in? -%>
                    <ul class="nav navbar-nav navbar-right">
                        <li><%= link_to 'Submit link', new_link_path %></li>
                        <li><%= link_to 'Account', edit_user_registration_path %></li>
                        <li><%= link_to 'Sign out', destroy_user_session_path, :method => :delete %></li>
                    </ul>
                <% else -%>
                    <ul class="nav navbar-nav pull-right">
                        <li><%= link_to 'Sign up', new_user_registration_path %></li>
                        <li><%= link_to 'Sign in', new_user_session_path %></li>
                    </ul>
                <% end -%>
    </nav>
  </div>
</div>

</header>

<div id="main_content" class="container pull-right">

<div id="content" class="col-md-9 center-block">
<% Category.all.each do |category| %>
  <li><%= link_to category.name, links_path(category: category.name) %></li>
<% end %>

<div id="sidebar"> <div id="logos"> <%= link_to root_path do %> <%= image_tag "logo.svg" %> <% end %> </div>

  <ul>
    <li class="category">Website</li>
    <li><%= link_to "All-Links", root_path %></li>
    <li><%= link_to "About", about_path %></li>
    <li><%= link_to "Usage", usage_path %></li>
    <li><%= link_to "Terms and Conditions", termsandconditions_path %></li>
    <li><%= link_to "Private policy", privatepolicy_path %></li> 
    <li><%= link_to "Rules", rules_path %></li>
    <li><%= link_to "Donate", donate_path %></li>
    <li><%= link_to "F.A.Q's", faq_path %></li>
  </ul>



</div>




            <%= yield %>
        </div>
    </div>
</div>

</body> </html>

/r/ruby Thread