URL field in accesslist of webproxy

There was a field in accesslist of webproxy named “URL” in 2.9.* versions.
we have developed “internet filter” / “Porn filter” / “Adult Filter” for children which is popular in our country. I have used porn, nude etc word in the URL field. But problem is in 3.* version there is no URL field. Can any body give me any idea, how it can be done ?
advance thanks for any effective idea.

please check:
http://www.mikrotik.com/testdocs/ros/3.0/pnp/proxy.php

section about /ip proxy access

there you can set up dst-host and path values to your liking to block certain words, phrases

Dst-Host = webpage address (http://test.com/path)
Path = anything after http://test.com/path
0709whiteUS(PDF6).png