Simple tag that return 'active' if given url is same that you are.

urlutils.py

from django import template

register = template.Library()

@register.simple_tag(takes_context=True)
def as_active_url(context, url, css_class='active'):
	"""
	Usage:
	{% url 'foobar' as url %}
	<li class="{% as_active_url url %}"><a href="{{ url }}">URL 1</a></li>
	{% url 'foobar' as url %}
	<li class="{% as_active_url url %}"><a href="{{ url }}">URL 2</a></li>
	"""
	request = context.get('request', None)
	if not request:
		raise template.TemplateSyntaxError(
			"Request must be enabled in context for this tag work. "
			"Check docs at https://docs.djangoproject.com/en/1.8/ref/templates/api/#subclassing-context-requestcontext."
		)

	if request.get_full_path() == url:
		return css_class
	else:
		return ''