They did men's pieces but they established the first separate men's line in 2002 if I remember correctly. Some of the old men's looks (pre official) look really good.
Re-post from earlier:
0: collection artisanale for women & men (the couture pieces shown during the haute couture presentations, the men's line are "0 10")
" ": Défilé (runway) collection for women (entirely white label, the original collection, it used to be synonymous with line 1 but hasn't been so since 2008)
1: the collection for women (more intellectual and process oriented line)
3: Fragrance (came out 2012 (?), developped by L'Oréal)
4: a wardrobe for women (more dressy and "timeless" stuff)
mm6: garments for ♀ (used to be just 6, these are the basic garments collection is also called "basic garments for women")
8: eyewear collection
10: the collection for men (equivalent of line 1, started in SS09)
11: a collection of accessories for women & men
12: fine jewellery collection (the equivalent of say Dior Joaillerie, so pricier stuff made in partnership with Damiani group)
13: objects & publications
14: A wardrobe for men (equivalent of line 4, started SS05)
15: mail order (an april 1999 partnership with Les 3 Suisses where garments were sold through their catalogue in France and Benelux)
22: a collection of shoes for women and men (started in AW05-06, previously were in line 1 and 10)
Sartorial: capsule collection part of line 14, basically pricey menswear suits done the traditional way, blingbling gold lining with the words Martin Margiela
Replica: collections 4 and 14 often include "replica" items, you'll see the word on the tag and they're reproduction of vintage objects and the origin is mentionned in a short text
Aids t-shirt: a series of tees to provide money to french charity AIDES fighting, you guessed it "aids", there is a text you can read when the tee is folded but not when you're wearing it.
On the labels you have the numbers from 0 to 23 with the appropriate collection circled but not all of them are in use.