apps won't update in Iphone 4

Hi! have seen many discussions for this same problem, but as they are dated last year I thought that there is a new way to solve the problem (I have tried many of the things suggested in previous posts)... I have an Iphone 4 with IOS7, and I had 14 updates to make and they are not working, I put "Update all" and they have been "waiting" to be updated for several hours now, but nothing is happening... I also tried to re-install some apps, but is the same thing with the new ones. Any ideas?? Thanks.