How to cache only a part of a view (included views)?

[eluser]term25[/eluser]
[quote author="obiron2" date="1342704000"]I know it's not the question you asked, but if you are always loading the same header and footer, have you thought about having a template file?

in your controller:

Code:

$data['main_content'] = 'the_bit_that_changes_view';
$this->load->view('template_view',$data);

In template_view;

Code:

$this->load->view('header');
$this->load->view($main_content);
$this->load->view('footer');

[/quote]

Yeah, I know, that's what I am doing, I just simplified it a little bit.

I am just curious if e.g. 3 or 4 php functions are a reason to cache and make an html from it or not.