Need Help

Hi i am looking for a good known working routine to achieve my goals.

I am 5'5 148 lbs 18% Body Fat

Looking to lower body fat to around 10% and don't won't to loose muscle

I am not a beginner I generally do a standard 4x8-12 16 set per body part 4 days a week.

Looking do something like different

If anybody can lead in the right direction

Just a couple questions first.  How are you breaking up your routine now?  Do you combine chest with shoulders or back?  Also, what is the training breakdown?  Are you using just machines, just free weights, or some sort of combination of the two?  Finally, what is your diet like?  You can cut down on BF% just by adjusting your diet without altering your training regime. 

24 yrs old
6' - 205 lbs
16% BF

Max (8/01/08):
Bench - 265 lbs
Squat - 455 lbs
Shoulder Press - 165 lbs
Deadlift - 385 lbs

Workout is like

monday chest/tries
BB bench 4x8-12
Db incline 4x8-12
Cables 4 dropsets
Dips 4x20 bodywieght
straigh pusdowns 3x10-12
Rope pushdowns  3 dropsets
10 min not stop abs

Tuesday
back/bies
chinups 4 to failure
seated row 4x8-12
latpulldown 4x8-12
romain chair 4x20 bodywieght
DB curls 4x8-12
BB curls 4x8-12
DB or BB curls 21's
10 min non stop abs

wendesday
Cardio
bike 45 minutes

Thurday
Shoulders
DB press 4x8-1
Lateral 4x12-15
front   4x12-15
Rear    4x12-15
shrugs  3x10-12
10 non stop abls

Friday note I have a bad hip so i take it easy    
leg extensio 4x15
leg curls 4x15
Hip flexers 4x15
calf raises 6x15 with some drop sets

weekends off

As for a diet I  healthy I do not follow any type of diet and not sure what diet to follow

Basic day
Breakfast  oatmeal w 3 egg whites
lunch chicken sandwhich or tuna
dinner chicken broc and rice
night snack apple with penut butter
Protein shack only 3 days a week monday wendesday and Friday
1 muti vitiam
2 fish oil

My hip is been alot better when I started hip flexers so my leg routine sucks but I don't want to have
my hip replaced before I am 40a

That seems pretty good, but you may want to make sure you are eating smaller meals every 2 hours if you can.  It will speed up your metabolism and help you burn that fat. If you are concerned with your progress, keep a log to monitor your weight and BF%.  If you notice you are losing a lot of weight and your BF% isn't dropping more than 1%, then most of the weight you are losing is muscle.  If your BF% drops and your weight is dropping slowly, then you are doing well.

24 yrs old
6' - 205 lbs
16% BF

Max (8/01/08):
Bench - 265 lbs
Squat - 455 lbs
Shoulder Press - 165 lbs
Deadlift - 385 lbs