SELECT id, 'kepek' AS 'table' FROM  `kepek`
ORDER BY TIMESTAMP DESC
UNION ALL
SELECT id, 'links' AS 'table' FROM  `links`
ORDER BY TIMESTAMP DESC
UNION ALL
SELECT id, 'quotes' AS 'table' FROM  `quotes`
ORDER BY TIMESTAMP DESC
UNION ALL
SELECT id, 'youtube' AS 'table' FROM  `youtube`
ORDER BY TIMESTAMP DESC
LIMIT 0, 15;