2 isp in 1 lan

i have 2 isp pldtsmydsl and smartbro. i connected my pldtmydsl on 1 router connected to 1 -8 port hub,and i have also smartbro connected to other router with 1- 8 port hub. all i want to do is to connect that 2 routers with thier hubs in just 1 network, meaning router 1 and 2 are all connected to 1 network.
pls. help how to do this… ty