Table #1 channels:
+-----+--------+---------------------------+------------------+------+
| uid | name   | url                       | epg              | last |
+-----+--------+---------------------------+------------------+------+
|   2 | ARD    | rtp://@239.35.10.1:10000  | ard              |    0 |
|   3 | ZDF    | rtp://@239.35.10.2:10000  | zdf              |    0 |
|   4 | Sat1   | rtp://@239.35.20.20:10000 | sat1_deutschland |    0 |
|   5 | RTL    | rtp://@239.35.20.10:10000 | rtl_deutschland  |    0 |
|   6 | RTL II | rtp://@239.35.20.22:10000 | rtl2_deutschland |    0 |
+-----+--------+---------------------------+------------------+------+

Table #2 settings:
+-----+---------------+----------+------------+-----------+
| uid | favorites     | channels | recprepend | recappend |
+-----+---------------+----------+------------+-----------+
|   1 | 2,3,5,4,13,14 | fav      |          0 |         0 |
+-----+---------------+----------+------------+-----------+

SELECT c.uid, c.name, c.url, c.epg, c.last, s.favorites FROM `channels` c CROSS JOIN `settings` s WHERE FIND_IN_SET (c.uid, s.favorites)