hello can any one give me script that i can block all web sites for specific user and only Skype can work

You can do with simple web proxy feature for block web sites.
First configure transparent proxy and then block with access list

For block the rest with firewall and for accept skype you can do with layer7 regex

Send from my mobile phone using Tapatalk.

First on main router check if firewall is on
than in firewall filter add this
chain=forward action=drop src-address="ip of ur client" protocol=tcp content=www.url_that_u_want_to_block.com
and that is

If u want to block all sites simple drop port 80 for specific user
or try content=www.*.com it should work