Plugin : Reveal IDs for WP Admin
Many Premium WordPress Theme need to ad some category ID (not category
name), some other wordpress premium theme also force you to add some
post ID also when you customize those premium theme. Sometimes, this
condition will confuse us, especially for some newbie that didn’t
know, what is those [...]
Read the other original article here : How to show Category ID for
Wordpress
Nice Info [1]

Links:
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[1] http://www.get4today.com

Read more : http://www.get4today.com/wordpress/how-to-show-category-id-for-wordpress/