code: def sub_menu(request, page_id):
      
      page = Page.objects.get(id=page_id)
      pages = page.children.all()
      page_languages = settings.PAGE_LANGUAGES
      return render_to_response("admin/basic_cms/page/sub_menu.html", {
          'page': page,
          'pages': pages,
          'page_languages': page_languages,
      }, context_instance=RequestContext(request))
docs: Render the children of the requested page with the sub_menu
      template.