I want to allow forward slash into SENAME

I want to allow forward slash into SENAME of my nop project. How can i do this using customisation?

for example,
1) I want product url like "/product/htc-one-m8-android-l-50-lollipop" instead of "/htc-one-m8-android-l-50-lollipop"
2) I want category url like "/category/desktops" instead of "/desktops"

I am using nopcommerce 4.3 version.

Any suggestion appreciated