<a href="<%= url_for( controller => 'changes', action => 'index', id => 0 ) %>">changes</a>
<a href="<%= url_for( controller => 'actions', action => 'index', id => 0 ) %>">actions</a>
<a href="<%= url_for( controller => 'changes', action => 'index', id => 0 ) %>">changes</a>
<a href="<%= url_for( controller => 'actions', action => 'index', id => 0 ) %>">actions</a>