cut from sef url

how automatice cut word from sef if it present for example http://helptoday.ru/uslugi/domrabotnitsy, http://helptoday.ru/uslugi/buhgalterskiy-uchet-i-audit - cut "uslugi"
http://helptoday.ru/domrabotnitsy, http://helptoday.ru/buhgalterskiy-uchet-i-audit