This is my split
Cardio 4-5 times per week in the mornings
tues - chest, tri's, abs, forearms, calves
thurs - back, bi's, abs, forearms, calves
fri - legs, abs, forearms
Sun - shoulders, circuit training (1-2 exercises per body part)
It's more traditional to do chest with tri's and back with bi's.
Your tris get hit hard with most of the chest excercises so it doesn't take much to finish them up after you train chest. Like wise for bi's after a back workout.