In this article I'll describe how to create main menu with selected item on page using Django extra tag.
The first step is to be sure that you have uncommented the following template loaders in your settings.py file:
TEMPLATE_LOADERS = (
In your application root create folder "templatetags" for tags instances. Create there two files: __init__.py and extra_tags.py. Then in templates folder create folder for templates of your tags. I've also called it "templatetags"...