CI Shopping cart - can't not update options value (size or color)

Code:

function validate_add_cart_item(){



        $id = $this->input->post('idproduct'); // Assign posted product_id to $id

        $qty = $this->input->post('quantity'); // Assign posted quantity to $qty

        $color = $this->input->post('colorproduct');

        $size = $this->input->post('sizecart');

        $this->db->where('idproduct', $id); // Select where id matches the posted id

        $query = $this->db->get('product', 1); // Select the products where a match is found and limit the query by 1



        // Check if a row has matched our product id

        if($query->num_rows > 0){



            // We have a match!

            foreach ($query->result() as $row)

            {

                // Create an array with product information



                $data = array(

                    'id'      => $id,

                    'qty'     => $qty,

                    'price'   => $row->price,

                    'name'    => $row->productname,

                    'size'    => $size,

                    'color'   => $color

                );



                $CI =& get_instance();

                $CI->cart->product_name_rules = '^.';

                //echo $this->cart->destroy();

                $this->cart->insert($data);

               // print_r($data);

                //print_r($this->cart->contents());





                return TRUE; // Finally return TRUE

            }



        }else{

            // Nothing found! Return FALSE!

            return FALSE;

        }

    }

Code:

function validate_update_cart(){



        // Get the total number of items in cart

        $total = $this->cart->total_items();



        // Retrieve the posted information

        $item = $this->input->post('rowid');

        $qty = $this->input->post('qty');

        $size = $this->input->post('size');

        $color = $this->input->post('color');

        print_r($color);

        // Cycle true all items and update them

        for($i=0;$i < count($item);$i++)

        {

            // Create an array with the products rowid's and quantities.

            $data = array(

                'rowid' => $item[$i],

                'qty'   => $qty[$i],

                'size'    => $size[$i],

                'color'   => $color[$i]

            );



            // Update the cart with the new information

            $this->cart->update($data);

        }



    }