If you have the websites in the database, it might be the best idea to get all the data combined using a JOIN. Like this:
(pseudo code)
SELECT c.type,c.model,w.link
FROM cars AS c
JOIN website AS w
ON c.id = w.car_id
If not, you must have some relation in your database to know for example that mazda is related to www.mazda.com (etc.). Then fetch all that data from the database, iterate through your array using the for loop and set something like this:
for ($i=0; $i<count($origArray); $i++) {
$origArray[i]['link'] = $dbArray['carName']; // or whatever the relation you have - name, id, etc...
}
Assuming that the $dbArray looks like this:
'mazda' => 'http://mazda.com',
'rangerover' => 'http://rangerover.com',
etc...