Function printCategorySelection

Prints the checkboxes to select and/or show the category of an news article on the edit or add page

Package: plugins\zenpage
Author: Malte Müller (acrylian), Stephen Billard (sbillard)
Located at zp-extensions/zenpage/zenpage-admin-functions.php

Parameters summary
`integer`	`$id = ''`	ID of the news article if the categories an existing articles is assigned to shall be shown, empty if this is a new article to be added.
`string`	`$option = ''`	"all" to show all categories if creating a new article without categories assigned, empty if editing an existing article that already has categories assigned.