Arriving on Mactan Island, you can start saving money straight away by using the Mactan Island and Cebu Jeepney route.
For all the relevant information you should visit the Mactan and Cebu travel Guide
A small example here:
Mactan Island Jeepney Route MI-02B – MEPZ1 to Cordova via Lapulapu Public Market;
Mepz1 – Marina Mall – New Bridge – Lapulapu City Hall – Gaisano Island Mall – Old Bridge – Opon – Cebu-Mactan Ferry Terminal – Lapulapu Public Market – Looc – Kalawisan – Babag – Cordova Foodpark – Cordova. On the return a small detour via RED line at Lapulapu Public Market.
View Mactan Jeepney Route MI-02B in a larger map