More Information

Combined with the manage_{$post_type}_posts_columns filter, this allows you to add or remove (unset) custom columns to the list post/page/custom post type pages (which automatically appear in Screen Options). The action described in here works both for built in post types as well as custom post types. manage_{$post->$post_type}_posts_custom_column can be used in WP 3.1 and later for specific custom post types. Note that if the custom post type has 'hierarchical' => true, then the correct action hook to use is manage_pages_custom_column.

Predefined Column Names:

The following column filters are already defined and used by WordPress. These can be redefined within a custom filter switch statement.

‘cb‘: checkbox for selecting post items for bulk actions
‘title‘: displays the post title as well as post action links (edit, quick edit, trash, view) based on user permissions
‘author‘: displays the username of the post author as a link to filter post by author
‘categories‘: displays the post categories as links to filter post by category
‘tags‘: displays the post tags as links to filter post by tags
‘comments‘: displays a comment icon with the number of comments as a permalink to manage the comments for that post
‘date‘: displays the date and status of the post