Text widget and https rewrite

I’m happy to have this block

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{SERVER_PORT} !^443
RewriteRule ^(.*) https://%{HTTP_HOST}/$1 [R,L]
</IfModule>

in my .htaccess

At first I believed it rewrites also the external links. Because if I’ve a link to (say) http://www.google.com and I’ve this: <a href="http://www.google.com">Google.com</a> in my html code, then I’ve https://www.google.com when I load the page.

Now imagine that google.com does not have the SSL, consequently, the link results broken and I can’t reach google.com.

I’ve this problem in a text wordpress widget, I double checked with a html file and the http remains http… so the problem it’s probably related to a wordpress setting.

Maybe I’m wrong, but I think it depends on permalink settings:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

Is there a way to resolve this issue?