by SilbinaryWolf on WordPress.org
Ultimate Metabox Tabs allows for keeping your post/page and ACF options user friendly for your client with the use of tabs.

The tabs in action. This illustrates their insertion just underneath the "Edit Post" heading.
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.