Bug 32585: (bug 32583 follow-up) Fix some variable references

Bug 32585: (bug 32583 follow-up) Fix some variable references

Bug 32583 change the $item variable from a hash to an object.  Trivial patch
to change some hash references to object method calls.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 10a8203811a979d0a7190b4df1411be33a1b6dd9)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>