def nav_aware(url):
default_category = Category.get_default(request.user).details()
# If we don't have a nav_category (user / about page) it should be the default for this user.
_nav_category = nav_category or default_category
if _nav_category['name'] != default_category['name']:
url += "?nav=%s" % _nav_category['name']
return url
