I’ll be a real man, take care of your son
Every problem you had before this day is now done

from Kanye West (Ft. Jay Z) – Murder to Excellence Lyrics on Rap Genius

Meaning

Kanye will use his success to help those closest to him with their material needs.

“Take care of your son” could refer to the problems of absent fathers in black communities.

Kanye was actually close to his father although they did not live together (as he has made allusions to his father on various tracks). he is still close with his father to this day. (see http://www.saiphifer.com/2011/12/spotted-kanye-west-takes-his-father-out.html)

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