Help to "step it up" with weight training

A friend and I are about the same body shape and size.  We have been working out together for about 5 months 3-4 days per week.  We usually warm up with a walk jog 30mins then will train certain muscle groups.....legs/abs, bi's/tri's/chest, and back/shoulders/abs again.  I usually stay away from any refined carbs/sugars etc...
 
We both are abt 5'2" 120 lbs....so we are not fat and we have seen some fat reduction, but we are still not seeing the toning results that I am looking for.  Our legs have definitely become more tone and less jiggly so to speak, but I have not noticed much tone in our abs or arms.  I have been stepping up the weight  in the past three weeks hoping that by pushing each muscle group to the max will help, but I am still not impressed with the results.  I am having a 10 yr reunion in 3 weeks and would love for my arms and legs to really become more lean/cut.  Any suggestions for us to both to become more leaner/cut?
 
Thanks so much for the suggestions.
 
PS...she is 24 I'm 28....I also eat 4-5 meals per day, I know this is important.
 
Thanks!

we could be a lot more helpful if we could have the exercises you are doing. so if you could just give us your routine would be a lot easier.