array woes

Hello all, I have some array code driving me nuts. I am pulling from a db: select id, vehicle, has_quotes from cars where active=1 I then loop through these and build an array that contains the id's and cars. while($res){ $cars[$res[id]]=$res[vehicle]; //here is the problem, when has_quotes is 1, I call another function to grab the quotes if ($res[has_quotes]>1){ $cars[$res[id]]=grabQuotes($res[id]); } } The grabQuotes function returns an array and works fine. THe problem is when I go to display these, I cycle through the car array printing id and vehicle name. I do a check so if vehicle name is an array, I print out the quotes from the inner array, problem is I have lost the vehicle name! How can I fix this?