Turn on Quick Mask Mode.
Select > Edit in Quick mask Mode.
Select the Gradient Tool.
Make sure Reflected Gradient is selected.
Double Click in the Edit Gradient box.
Make sure gradient is Black to White.
Create a Gradient Mask over the parts of the photo you wish to remain in focus.
Turn off Quick Mask Mode
Go to Filter > Blur > Lens Blur
Adjust to suit the image.
Deselect Control (Command) D
Go to Image > Adjustments > Vibrance
Bump up Saturation 30 - 40 %