I've seen a couple of questions on the site with regard to the Lakers 2013 draft pick - hope this deconstructs it:

2013 first round draft pick to Phoenix
The L.A. Lakers will send the least favorable of their own 1st round pick (top-14 protected), Cleveland's own 2013 1st round pick, Sacramento's own 1st round pick (top-13 protected) and Miami's 2013 1st round pick to Phoenix. If the L.A. Lakers' 1st round pick is within the top-14 selections, Phoenix will automatically receive the L.A. Lakers' 1st round pick. [L.A. Lakers-Phoenix, 7/11/2012]

* Cleveland has an option to swap their draft picks (their own 1st, Sac's 1st, or Miami's 1st) with the Lakers, however they can't swap with the Lakers if the Lakers draft pick is in the top 14.

*The Lakers make the playoffs at a lower seed than Miami, at which point Cleveland would swap Miami's pick with LA.

*We would then get Miami's pick.

Scenario 2

*The Lakers make the playoffs at a higher seed than Miami, Cleveland doesn't swap.

*We get LA's pick.

Scenario 3

*LA doesn't make the playoffs. Cleveland cannot swap draft picks.

*We get LA's pick, UNPROTECTED.

Hope that clears things up.