For the seven 220 V/0.5 A outputs you don't even need relays. Since the current is only going to be about 0.5 A, a MOSFET rated for 250 V would suffice...MOSFETs don't work with AC. (You could do it with a pair of complementary MOSFETs on each output, but would get "messy".) Plus, he needs some "safety" isolation between the 220V and the Arduino.
Opto-triacs are one route for AC - find a nice mains-rated board with relays and/or opto-triacs to use. And remember 0.5A inductive is completely different from 0.5A resistive as far as loads go. 6A or 10A rated relays are likely to both be up to the job and last a lifetime.