How can I setup .htaccess for custom routing

I have the following list of wordpress websites in the root of the hosting: - Website1 - Website2 - Website3 - Website4

Until now I had access to each website by following: www.test.com/Website1, www.test.com/Website2 .. and so on. Now I want to reorganize the websites in subfolders, because they are from the same customer. - Website1 - Website2 -Website3 - Website4

But I want to build a specific .htaccess file or to use a php routing library like https://github.com/klein/klein.php to have the same access like from beginning. If I want to access Website3 to make the same request www.test.com/Website3, not http://bit.ly/2UTpEf2

Is there a solution using .htaccess for this rask?

Thanks in advance!

I tried to change the .htaccess. I saw an example in rewrite a folder name using .htaccess

RewriteEngine on RewriteRule ^apple/(.*) folder1/$1

RewriteCond %{THE_REQUEST} ^GET\ /folder1/ RewriteRule ^folder1/(.*) /apple/$1 [L,R=301]

If I want to access Website3 to make the same request www.test.com/Website3, not http://bit.ly/2UTpEf2