app/views/user_has_roles/edit.html.erb
<div id="content_detail" class="ui-corner-all">
<h1 class="title"><%= t('page.editing', :model => t('activerecord.models.user_has_role')) -%></h1>
<div id="content_list">
<%= render 'form' %>
</div>
</div>
<div id="submenu" class="ui-corner-all">
<ul>
<li><%= link_to t('page.show'), @user_has_role -%></li>
<li><%= link_to t('page.back'), user_has_roles_path -%></li>
</ul>
</div>