How to update the url correctly

Hi there, i've been using CodeIgniter for at least 5 months.
When i use the view function, it loads a new file correctly. But the url text does not change, unless 
i do it through a link that loads a new path.

For example, if i have a Login controller with a method login the url would look like:
      http://my_project_path/Login/login
If i click in the submit button with the above url, and in the controller i use the view function to load
the view("index"), it still reamains the same text in the url. It is pretty annoying for me, could any one help me
please?