Any good ORM library/ helper you guys can recommend?

So I've been working on a project already for around 4 months I guess and is almost done, however there is something I really need in almost any if not all of my controllers and I'm referring to creating any type of relational tables; in my case I need many-to-many relationship.

I tried everything I could but somehow it did not work and then I just realize today morning that CodeIgniter does not support mapping. So I was like...so that's why I've been lately struggling with my project.

So yes, that's pretty much I want to say.

Do you guys know about a good library or helper that I can use to create this functions(with some type of tutorial; not necessary)? , please .

I do Front-End development most of the time 

Integrating Doctrine ORM with CodeIgniter

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )