Moving playlists and categorising them

[malushik]

For example, if I have added albums (do not confuse with songs) by Okean Elzy, Tartak, and so on to the playlists, I need to sort them into separate arrays of artists, Similarly, I want to implement the movement of playlists so that on one page Okean Elzy starts, then Tartak, and not first one playlist of such an artist, then another, and so on