How to setup 2 versions of http/https site on yii1 + htaccess?

Question

Yii

Good afternoon. The site is hosted by timeweb. There was a task: there is a site with https. Redirects from http to https or vice versa have not yet been set up, there are reasons for that: seo. You need to split the site into 2 versions.
1) with https
2) with http I
created a dev folder in the public_html folder where I placed a copy of the site with some SEO changes
In the htaccess settings (at the root - public_html) I wrote:

<IfModule mod_rewrite.c> 
RewriteEngine on 
RewriteBase /
RewriteCond %{HTTP:X-HTTPS} 1
RewriteRule ^(.*)$ /dev/$1 [QSA,L]
</IfModule>

That is, if the protocol is https - send requests to the dev folder. I switch to the c https version - everything works. But if I open an internal page, for example contacts, the main page opens. Be sure to add the /dev/ prefix. That is, https://site.ru/dev/contacts works, and https://site.ru/contacts opens the main https://site.ru/. What rules should be specified in the htaccess of a new project located in the dev folder? I can't solve this problem in any way. Thanks