Apple doesn’t want you to forget about Dre. Now their buyout of Beats Electronics is complete they have given the headphone manufacturer a prominent section on the Apple Store so customers can easily find their range of products.
The section can be viewed by selecting Store from the menu bar, then Shop Accessories then Beats by Dr. Dre. From there you can choose to view headphones, in-ear headphones, Beats speakers and Beats accessories.
Apple continues to sell other brand headphones including Bose, RHA and Sennheiser but they are in the more general Headphones & Earphones section.
The Beats website is still up and advertising their full range of products, but to purchase a product you have to click on a Buy Now on the Apple Store button which redirects you to the Apple Store.
Source: Beats on Apple Store