Like this?
From client side > say /change [via conmd/clcmd]
From console > /change [via srvcmd]
PHP Code:
register_concmd("say /change", "CMD_ModeChange", ADMIN_VOTE, "<Смена режима Mode 2x2, Открыть/Закрыть карту>");
&
PHP Code:
register_srvcmd("/change", "CMD_ModeChange");