code: def get_nodes(self, request):
          
          nodes = []
          nodes.append(NavigationNode(_('Tags'), reverse('zinnia:tag_list'),
                                      'tags'))
          for tag in tags_published():
              nodes.append(NavigationNode(tag.name,
                                          reverse('zinnia:tag_detail',
                                                  args=[tag.name]),
                                          tag.pk, 'tags'))
          return nodes
docs: Return menu's node for tags