如何在Codeigniter中禁用cookie和缓存

I am facing a problem regarding the cache and cookies and Codeigniter.

When I log in using a username and a password, there is a prompt like this.

I then click Save Password. After that I have one form where there are also username and password fields. These fields become automatically filled with the username and password that I have entered from the previous application login.

How do I get rid of the username and password? I am using Codeigniter.

I found this that presents a theory. I quote:

If the browser detects <input type="password">, it will assume that the <input type="text"> IMMEDIATELY in front of it is the username input.

With some testing myself, I found this to be true.

In searching for solutions I found this one.

Specifically:

Simply create a couple of fields and make them hidden with "display:none". Example:

<!-- fake fields are a workaround for chrome autofill getting the wrong fields -->
<input style="display:none" type="text" name="fakeusernameremembered"/>
<input style="display:none" type="password" name="fakepasswordremembered"/>

This is a kludgy solution. However it works.