app/views/system_maintenance/index.html.erb
<div id="content_detail" class="ui-corner-all">
<h1 class="title">System maintenance</h1>
<div id="content_list">
<%= form_tag('/system_maintenance/execute') do %>
例外メールの送信:
<%= button_tag("send exception", id: "exception", name: 'execute_exception') %>
<% end %>
</div>
</div>
<div id="submenu" class="ui-corner-all">
<%- if false -%>
<ul>
</ul>
<%- end -%>
</div>