Sending data from one controller to another

So how is "pass that data to the LOG controller for entry into the log table" different than "each controller method to the LOG Model for processing"

Using the model I assume you have something like:
$this->log_model->add('FOO BAR');

Where your hoping it could be something like?
$this->call_controller('controller_name','controller_method','FOOBAR');

I am confused as to why this needs to be a controller method call?

DMyers

https://github.com/ProjectOrangeBox / https://github.com/dmyers2004