If you have a card reader on your PC, then simply remove the card from your mobile, place it in the PC card reader, read the MP3 tracks from it and use Nero to convert and burn to a CD.
From looking at the specs of your phone, you probably have a mini-usb port, so a USB cable from the PC to the phone will provide an alternate way to send your MP3s to the PC, ready to burn.
But as a direct connection between hifi and mobile, well, your phone has a TV-Out socket. This should be able to transmit both audio and video, but I can't see what type of socket the phone has.
If it's a small/normal 2.5 jack for headphones, then a jack to dual out (Red and White) cable will do the trick.