I like to group my podcasts into categories (i.e. Business, Gardening, Birding, Comedy etc...) via playlists.
To get the old style playlists back.
Delete the Podcast App from your iPhone.
Turn off and on your iphone.
Your podcast playlist will be in the Music App (just like before)
You'll need to select them from iTunes on the podcast Tab.
Hope this helps.
I also used playlists to listen to podcasts. I upgrade to iOS 7 yesterday and found that Apple added the functionality to the Podcasts App. Open the Podcasts App, Select My Stations (on the bottom), Select iTunes Playlists, Select your playlist, Start listening to the podcast on the top of the list.