I have a table with categories:
ID Category \"1\",\"Baking\" \"3\",\"Family\" \"4\",\"Entertaining\" \"5\",\"Children\" \"6\",\"Desserts\" <
A second way of doing it (the first one being with CASE WHEN ... THEN END as already stated in other answers) is:
CASE WHEN ... THEN END
ORDER BY ID=4 DESC, ID=3 DESC, ID=1 DESC, ID=5 DESC, ID=6 DESC