How to throw mongoDB query, directly to mongoDB server?

[eluser]zacksyah[/eluser]
is there function to throw query mongoDB like this $this->db->query($query) because I want to create mongoDB executor in codeigniter so if I type this query like this db.users.find({age:33}) codeigniter throw that query directly to mongodb server. or is there another way? please help, thanks in advance

[eluser]Glyn[/eluser]
I have created an example case of MongoDB in Codeigniter if you are interested.
Code available to download at http://glynrob.com/database/mongodb-in-codeigniter/