Codeigniter caching the same method with other parameters - php

Question

I´m working on caching in Codeigniter and I find out one problem which I don´t know how to solve:
I have method view_produdcts() where I get products according the url and render the view. I turned on the cache there but if I want to render product´s with some parameters for the first time, it´s ok, but if I try to render another products with other parameters, it still returns me the products which I loaded for the first time.
Do you know, how to solve it?
Thank you very much for your ideas.
Here is my method:
/**
* view products by parameters
*/
public function view_products()
{
$limit = 12; // limit of products per page
$attrs = parse_attributes_from_url($_GET); // load attributes from url
$config['per_page'] = $limit; // set some config files for paging
$config['base_url'] = prepare_url_from_attributes_for_paging(generate_url_from_attributes($attrs));
$config['cur_page'] = $attrs['page'];
$attrs['limit'] = $limit;
$data['products'] = $this->products_model->get_products_specified($attrs); products
$data['popular_categories'] = $this->categories_model->get_popular_categories();
$data['all_categories'] = $this->categories_model->get_categories_list_eshop();
if(isset($attrs['cat']) && $attrs['cat'] != null){
$data['category_title'] = $this->categories_model->get_category_title($attrs['cat']);
}
else {
$data['category_title'] = $this->categories_model->get_category_title(3);
}
main_view_front('products/category', $data);
}