[deprale]

PHP Code:

#include <amxmodx>
#include <hamsandwich>
#include <cstrike>
#include <fakemeta_util>

new g_tRest;

new const tRest[][] =
{
    "weapon_c4"
}

public plugin_init()
{
    RegisterHam(Ham_Touch, "weaponbox", "fw_TouchWeapon");
    RegisterHam(Ham_Touch, "armoury_entity", "fw_TouchWeapon");
        g_tRest = register_cvar("amx_tRest", "1");
}

public fw_TouchWeapon(weapon, id) 
{
    if (!get_pcvar_num(g_tRest)) //Checks if g_tRest is deactivated (set to 0)
        return PLUGIN_CONTINUE //If it is, let players on T side pick up weapons
        
    if ( !is_user_alive( id ) || ( cs_get_user_team( id ) != CS_TEAM_T ) )
    {
        return HAM_IGNORED
    }
   
    static classname[32]
    pev(weapon, pev_classname, classname, charsmax(classname))
 
    for(new i = 0; i < sizeof tRest; i++)
    if (!equal(classname, tRest[i])) 
    {
        //Sends a message that weapons are only for CT's
        client_print(id, print_center, "You can only pick up the bomb on T side.")
        return HAM_SUPERCEDE
    }
    return HAM_IGNORED
} 


Try it, didn't test. (DRUNK & my b-day)
If not, wait for someone more qualified to answer!

ALSO forgot to specify, thanks to Unkolix(VIP Plugin V5.4.5) and AMXX Documentation I was able to code this, Hope it works!