notifications-admin/app/templates/main_nav.html

<nav class="navigation">
  <ul>
    <li><a href="{{ url_for('.dashboard', service_id=123) }}">Dashboard</a></li>
  </ul>
  <ul>
    <li><a href="{{ url_for('.sendsms', service_id=123) }}">Send text messages</a></li>
    <li><a href="{{ url_for('.sendemail', service_id=123) }}">Send emails</a></li>
    <li><a href="{{ url_for('.showjobs', service_id=123) }}">Activity</a></li>
    <li><a href="{{ url_for('.manage_templates', service_id=123) }}">Manage templates</a></li>
  </ul>
  <ul>
    <li><a href="{{ url_for('.apikeys', service_id=123) }}">API keys and documentation</a></li>
  </ul>
  <ul>
    <li><a href="{{ url_for('.manageusers', service_id=123) }}">Manage users</a></li>
    <li><a href="{{ url_for('.service_settings', service_id=123) }}">Service settings</a></li>
  </ul>
</nav>