The Divi theme comes with a filterable portfolio module which lets you filter a list of projects by category. These category 'tabs' are sorted alphabetically by default.

Here's how the filterable portfolio looks in this case:

Changing the Filterable Portfolio Tab Order using Divi Booster

Divi Booster includes an option to change the order of the filterable portfolio module tabs. It can be found at:

Filterable Portfolio Settings > Design > Layout > Tab Order

Like so:

This option is available in Divi Booster v3.5.1 upwards.

Reverse Tab Order

To make the tabs display in reverse alphabetical order, set the Tab Order option to "Reverse":

Here's how the filterable portfolio looks in this case:

Random Tab Order

To make the tabs display in a random order each time, set the Tab Order option to "Random":

Here's how the filterable portfolio looks in this case:

Note that caching plugins may cause the same random order to be displayed each time. If this is undesirable, it can be solved by disabling caching on the page with the filterable portfolio.

Custom Tab Order (By Category Slug)

To make the tabs display in a custom order each time, set the Tab Order option to "By Slug". This will cause a new "Tab Order Slugs" option to appear. Entering a (comma-separated) list of category slugs here will cause the corresponding tabs to be displayed first, in the order given:

Note: You can find out the category slugs by going to "WP Dashboard > Projects > Categories".

Here's how the filterable portfolio looks in this case: