Thanks Ali Arshad,
It’s work with:
RewriteCond %{HTTP_HOST} ^[^\.w{3}]+\.domain.com$
RewriteRule ^$ %{HTTP_HOST} [C]
RewriteRule ^([^\.w{3}]+)\.domain\.com$ filename.php?name=$1
I am very grateful, because it has helped me find a solution.
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solved htaccess filename.php?name=category to subdomain category.domain.com