Make NOT Linkeable on empty c_desc field

Hi, I need to take off the Links to the contents (c_desc) when the field c_desc is empty...

I mean, actually the script makes clickeable menu (If c_desc have or not Contents)
i need to UnLink thoes items-links if they dont have c_desc content

NODE1 (this node has contents in c_desc) <-Clickeable OK
\--Node2
\--Node3

Node 2 (this node has no contents in c_desc) <- NotClickeable
\Node2-1
\Node2-2

THANKS! AND SORRY MY BAD ENGLISH.
Hope someone know how to do this.