If you want it off permanently, in your configs/plugins-csdm.ini file change this
csdm_equip.amxx
to this ;csdm_equip.amxx
If you want it by map then you will have to create a maps folder inside your configs folder.
then create an ini file like lets say "plugins-de_dust.ini"
in there you will put the line csdm_equip.amxx disabled
Now every time de_dust loads the weapons menu will not show up.
Also look at your csdm.cfg file in your configs folder. Look at this section
;You must be running the equip plugin for these sections
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
[equip]
;Equip Menu flags:
; p - primary
; s - secondary
; a - armor
; g - grenade
; b - buy
menus = psag
;Autoitem flags:
; a - armor
; h - helmet
; g - grenades
; d - defusekit (CTs only!)
; n - nightvision
autoitems = ah
;Grenade flags:
; f - flashbang
; h - he grenade
; s - smoke grenade
grenades = hs