Well, normally, wouldn't you just use an iterator in a for loop to loop through the list, and get data from the current node? How are you doing it? Are you unsatisfied with the way you do it?
Ohhh, do you mean iterating through every int that is in those vectors that are in those lists? You could use another for loop to iterate the vector, like you would if you were to iterate through a 2d array.
Or you could write an iterator class for list<vector>, but that might be overkill unless it's used very often.