If you've enabled the display of CB Menu tab on profile you could display the menu link there instead of inside of CB Content. Aside from that no, as the link is generated internally. It's less complicated if you're not allowing them to send a PMS with the invite, but if you're allowing them to send a message then the link is much more complex as the JS is also generated internally. There's also no substitution to check if someone is connected or not so having a conditional in a delimiter field isn't possible without aid of incubator project CB Query Field.