[Social-discuss] IPV6 link

[KeysXu]

Hi

I have my site www.mysite.com and ipv6.mysite.com pointing to the same 
gnu-social website.
and also I have set up ipv4 and ipv6 AAAA record on DNS .
as a result ,when user go to www.mysite.com ,they will go throw it as in ipv4 
network.
when user go to ipv6.mysite.com,they will go throw it as ipv6 network.
But 
there all the user ,group and post data is kept in database as absolute path ,
so there is a link like ‘<a href=“http://www.mysite.com/xujian”>xujian</a>’ ;

right now ,the current user is visit ipv6.mysite.com and he is in ipv6 network ,
but when he click this link , he will go to  http://www.mysite.com/xujian but 
not http://ipv6.mysite.com/xujian

Is there any method make this user goto ipv6.mysite.com/xujian but not 
www.mysite.com?