Very good for a first map. The geometry and lighting are especially good, and it looks a lot more professional and mistake-free than most first maps here. It's simple but elegant, which is a good place to start, and a direction in which a lot of great mappers are heading these days...

Some suggestions I have:
-the flat adobe-like texture is used almost everywhere in this map, even as the ground, and in my opinion there are much better textures to use: the cuttent one is a bit dark and makes it seem like the whole map is made of wet clay.
-Check your spawns. I was having some red spawns in blue areas, and vice versa, which really messed up the gameplay.
-Add waypoints. You can do this by tryping "dropwaypoints 1" and "showwaypoints 1" and running around the map until you've covered all the paths, and then type "savewaypoints".
-The lighting is good, but it needs a bit more contrast. Try decreasing the ambient to about 16 and adding more lights in dark places. Also, the lights are pretty blocky near the skylights, so try typing "blurlms 1".
-There's no way to access the top level except by a back route or over the roofs of other buildings, which is OK gameplay, but it seems counter-intuitive. I didn't really have much of a problm with it though, so it's really your call on this one.
-Try making the windos a little bit bigger. I could fit through if I tried hard enough, but it was always a bit frustrating to get the jump just right.
-Map is improperly packaged. I'd add a link to the guidelines if I could, but I don't know how yet.
-Maybe add a bit more variety to the plants on the low walls? It seems a bit unrealistic that there are rows of the exact same plant facing the exact same direction and looking the exact same way. Just an idea, shouldn't be too hard to implement either.

If you could contact your friend and give him this advice, I would be really glad. I'm not exactly an expert at mapping yet, but I see great potential here.

Well, I agree Greaserpirate for a first post it's a pretty good map.

Content
The screenshot seems to be ok, even it could show a little bit more than just piece of the map.

Theme
The theme isn't really coming through. Your saying it's an arabic-styled map, while I don't see much of that back into the map. Be sure to mark that even more into the map. Look at maps like "arabic" or "dust2" and see what makes them different from your map.

Texturing
I also agree with Greaserpirate, the "matbrown_lgt2" texture of Soc isn't a really good choice to use as a primary texture. It's a texture which shouldn't be used at all times, just only on a few places and only in some cases. It also isn't really paying off for the theme.

Geometry
The geometry still needs some work too. Putting a repetitive wall all around the map makes the map look very boxy and unrealistic. Be sure to add something like hills and a gate to make it more natural.

Lighting
The lighting isn't really bad, but it's still not that great on some places. Like there are corners in buildings which are definitely reachable for the torches next to them, while they are unlighted.
The skylight makes the map look very neutral and pretty boring actually. Be sure to add something else instead, as skylight is actually meant to neutralize a very bright light which is often putted outside the map.

Detailing
There isn't much detailing yet. Only some mapmodels (actually provide real detail. This wouldn't be bad if they wouldn't be overused. Be sure to use several mapmodels instead of just a few types, as they lose their "magic" of being a detail when they appear often.

Clipping/Noclipping
The clipping still needs some work. Players are able to get outside the map and even gain access through walls after that. Be sure to add a ceiling of clip material, to prevent this.

Flow
The flow isn't really bad but still needs some work. There are still some doorways were players would bump against the ceilings when they jump (especially on stairways in this case).

Gameplay
The map is still lacking pickups. Be sure to add them, as the map should provide more than just modes like instant gib.
Ever heard of the option "entselsnap"? It's binded on "6" in edit-mode. Be sure to use it next time when placing things like playerstarts.

Overall
The map looks ok for a first-post, but still requires a lot of work to get a really nice looking map. Keep it up! I'll give 4/10 for now.

as arabian i don't think its 'arabian style' map, try making Burj Khalifa or Al Hamra & Kuwait Towers and you can call this arabian style.