Execute the following query:
ALTER TABLE mytable MODIFY COLUMN columntobemoved INT AFTER columnbefore;

mytable = the table you are modifying
columntobemoved = the column that will move in the table
columnbefore = the column that will be before the column you move. I.e. if you have columns a, b, c and you want to put columntobemoved after b (so between b and c), you would use b as the columnbefore value