[Django]-How to load objects from model on server start up?

Well, I’m very new to django, and maybe I’m wrong, but I think you are looking for something like caching. Read the docs, and decide whether is it fits you or not.

You can cache just a part of your view:

https://docs.djangoproject.com/en/1.3/topics/cache/#template-fragment-caching

surround your navigation bar like this:

{% cache 500 navbar %}
   ... put your navbar code
{% endcache %}

and ensure to have

{% load cache %}

at the top of your template or the base template.