Meta Box Conditional Logic

Meta Box Conditional Logic is an extension for the Meta Box plugin that shows or hides meta boxes, custom fields and HTML elements based on other field values or conditions. Fields appear instantly as data is entered on the page.

It works on meta boxes registered with Meta Box or WordPress core, on custom fields registered with Meta Box, and on any HTML element such as the Publish or Tags modules. It also works with fields inside a group. Conditions can depend on other fields' values, categories, post format, post title and other form elements.

The operators are =, >=, <=, contains, in, starts with, ends with and between. Each can combine with Not for a negation. You can layer multiple conditions into one compound statement.