I try to reconfigure the work of the site (online store), there are many regions and switching between them is done through the link parameter http://site.ru/?region=kyiv
But I want to transfer individual cities to subdomains and so that the census of links is approximately like this:
http://site.ru/?region=kyiv на http://kyiv.site.ru/ http://site.ru/some_category-7/?region=kyiv на http://kyiv.site.ru/some_category-7/ http://site.ru/some_category-7/some_good.html?region=kyiv на http://kyiv.site.ru/some_category-7/some_good.html
There are several such cities. Thank.