Code

 // load required libraries
 $this->load->library("pagination");

 //initalise search data array
 $uri_search_data = $this->uri->uri_to_assoc(3);

        //set status
        $search_data['products.status'] = Product::STATUS_ACTIVE;

        // check url to see if any of the following segment pairs are set
        if(isset($uri_search_data['category']))
        {
           $search_data['product_categories.category_name'] = urldecode($uri_search_data['category']);
        }
        if(isset($search_data['brand']))
        {
           $search_data['product_brands.brand_name'] = urldecode($uri_search_data['brand']);
        }
        if(isset($search_data['range']))
        {
           $search_data['product_ranges.range_name'] = urldecode($uri_search_data['range']);
        }

        //get number of items per page limit
        $limit = 12;

        // new empty product object
        $product = new Product();

        // get pagination config array
        $config = array();
        $config["base_url"] = base_url('our-products/browse/' . $this->uri->assoc_to_uri($uri_search_data));
        $config["total_rows"] = $product->count_records();
        $config["per_page"] = $limit;
        $this->pagination->initialize($config);

        // get offset from uri defaulting to 0 if not present
        $offset = end($this->uri->segment_array()) ? end($this->uri->segment_array()) : 0;

        // get all products
        $products = $product->get_where($search_data, $order = NULL, $limit, $offset);

        // assign data to view
        $this->view_data['pagination_links'] = $this->pagination->create_links();
        $this->view_data['products'] = $products;

        // load default template
        $this->parser->parse('website/products/list.tpl', $this->view_data);