We'll create fresh WordPress site with Ultimate Metabox Tabs installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Ultimate Metabox Tabs adds metabox tabs to your posts, pages and the Advanced Custom Fields options page.
They allow you to easily allow tabbable and sortable metaboxes on your editing page so that your client can do less scrolling and more editing.
They’re also inserted at server-time, meaning no ugly javascript forcing the metaboxes into the page.