How could craving be the habit of reification? Below, it says that "craving" is the habit of reifying things, resulting in the notion that we need ever-increasingly more things to live happily.

How could craving (tanha) be the habit of reification (papanca)? How does it link?

From Piya Tan's commentary of Cetana Sutta (SN 12.38-40):


  What is interesting here is Mahā Cunda’s statement (from MN 144)
  that rebirth and suffering are rooted in "emotional dependence"
  (nissita), which the Majjhima Commentary explains as arising on
  account of craving and view (MA 5:83). "Craving" is the habit of
  reifying people, things and ideas, resulting in the notion that we
  need "more and more" to live happily; "view" is the delusion that
  sustains and moves craving, and its necessary opposite, hate.
Reification is simpistic naive superficial perception. It's a generalization of the same problem that children have with toys. A child sees a new shiny toy and because he does not think deeply, because his perception is superficial - in his mind the toy is attractive and desirable.

Reification is seeing the outer image and buying into its glow, its fake promise to make you happy.