getting to a view directory

I have this in my routes

$route['default_controller'] = 'Users/login';
$route['subit_backend']['GET']='subit_backend/register';

Users is a controller. Configure is another controller. Subit_backend is another controller. I see the lower case in it. But it seems to work and I'd hate to break it.

I moved public function save_userinput() into Users. So now I have the form (which is in views/Users). This Users is a subdir of views.

<form name ="userinput" action="/Users/save_userinput" method="post"> This Users is a controller.

This is the function I put in the Users controller

public function save_userinput()
{
//code goes here
// for example: getting the post values of the form:
$form_data = $this->input->post();
// or just the username:
$username = $this->input->post("username");

// then do whatever you want with it

}

When I run this I get in the address bar: https://www.rdsubstantiation.com/Users/save_userinput

and this int he window:
Not Found
The requested URL /Users/save_userinput was not found on this server.

proof that an old dog can learn new tricks