app/views/layouts/_breadcrumb.html.erb
<ol class="breadcrumb">
<li class="<%= active_if 'organisations' %>">
<%= link_to "Organisations", organisations_path %>
</li>
<li class="<%= active_if 'volunteer_ops' %>">
<%= link_to "Volunteers", volunteer_ops_path %>
</li>
<li class="<%= active_if 'services' %>">
<%= link_to "Services", services_path %>
</li>
</ol>