PHP Separate admin controllers CODEIGNITER

I have some basic controllers and admin controllers, I'm trying to separate them in folder to avoid things like this one:

controllers/user.php -> general users contr开发者_运维知识库ollers/a_user.php -> for admin users

I've read some things about route but couldn't find a way to do that.

Thanks in advance for any help.

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Create a subfolder inside controllers folder and place your admin controllers in there.