app/views/spree/admin/shared/_subscription_tabs.html.erb
<h1><%= Spree.t(:subscription).titleize %> <%= @subscription.id %></h1>
<% content_for :sidebar do %>
<div id="subscription_tab_summary" data-hook>
<h3 id="subscription_id" data-hook><%= Spree.t(:subscription).titleize %> #<%= @subscription.id %></h3>
<h5 id="subscription_status" data-hook><%= Spree.t(:status) %>: <%= Spree.t(@subscription.state, scope: :subscription_state) %></h5>
<br class="clear" />
</div>
<br class="clear" />
<ul class="sidebar" data-hook="admin_subscription_tabs">
<li<%== ' class="active"' if current == 'Subscription Details' %>>
<%= link_to Spree.t(:subscription_details), edit_admin_subscription_url(@subscription) %>
</li>
<li<%== ' class="active"' if current == 'Customer Details' %>>
<%= link_to Spree.t(:customer_details), admin_subscription_customer_url(@subscription) %>
</li>
</ul>
<% end %>