You can save your recipes through the recipe page itself, but you can also organize them in the My Kitchen area within the folders you have created. You can move or copy recipes between them. To do this:
Tap "Edit recipes."
Select the desired recipe(s);
Choose the desired folder and tap "Save".
If you want to move the recipes between created folders just follow the same process, but instead of copying, just select the "move" button and choose the desired folder. The recipe will leave the original folder and appear in the new selected folder. :)