foreach($cart->line_items as $key => $line) {
$inv->add_grn_to_trans($line->grn_item_id, $line->po_detail_rec, $line->stock_id,
$line->item_description, $line->receive_qty, 0, $line->receive_qty,
foreach($cart->line_items as $key => $line) {
$inv->add_grn_to_trans($line->grn_item_id, $line->po_detail_rec, $line->stock_id,
$line->item_description, $line->receive_qty, 0, $line->receive_qty,