css需要永远加载

here's what i have :

file structure:

Here is link to css from view/_templates/header.php

Here's my config.php in the config folder:

If i echo out URL i get the following:

http://localhost:8080/mini/

This is what ive done:

I have change the path to css:

HERE IS THE MAIN PROBLEM:

When i changed the css path it only worked once. If i make any changes to my style sheet, then the page style does not get updated immediately, If i refresh the page after about a minute , the new styles is then appled.

I use Ubuntu 14.04, dont know if that is relevant or not.