I think the option is still there, however WDS is NOT compatible with WPS, so first disable that @ Advanced > Wi-Fi Protected Setup > Disable. The WDS option is under Advanced > Advanced Wireless but to see it you have to turn off "style". I don't know how to do it in Chrome, but with MSIE, it's ALT + V > Style > No Style. If it doesn't work with WPA2 try with WEP. Also, there have been some reports of compatibility issues with other routers. What model router are you trying to connect it to? Do you have 2 DIR-625?
PS. @Moderator Why does Dlink hide options in such a way? If they are no longer supported, why not remove them from the firmware?