How to replace a section of text file bash script

Goal:
I want to replace a section of hibernate.cfg.xml with new servers.  I need to remove servers between
                <property name="hibernate.memcached.servers">
server1 server2 server3
                </property>

and replace them with mem1 mem2 mem3

cat replace.sh

#!/bin/bash awk 'BEGIN {A = 1};//{A=0; print "\t\t\n\t\t\t\ mem1.atl.company.com:11212 mem2.atl.company:11212 mem3.atl.company.com:11212 mem4.atl.company.com:11212 mem5.atl.company.com:11212 mem6.atl.company:11212 mem148.atl.company.com:11212 mem149.atl.company.com:11212 mem150.atl.company.com:11212\ \n\t\t"};/.*/ { if ( A == 1) print $0};/<\/property>/{A=1}; ' $1

Run script against any xml file

./replace.sh hibernate.cfg.xml > hibernate.cfg.xml.new