gistfile1.txt

<% with Project %>
  <ul class="nav level-2">
  <% if Environments %>
    <% loop Environments %>
      <li><% if CanDeploy %><a href="$Link">$Name</a><% else %>$Name<% end_if %></li>
    <% end_loop %>
  <% end_if %>
  
  [...]
<% end_with %>

---

<?php

class Envrionment {
  ...
  
  function Link() {
    return $this->Project()->Link()."/environment/" . $this->Name;
  }
}