apache - Using .htaccess to redirect to an subdirectory -

i developing rest service , have versioned. have 1 subdomain named api points api folder. have following folder structure:

api   |__ v1        |___ public_html                     |____ .htaccess 

at moment can use "http://api.mydomain.com/v1/public_html" (which triggers .htaccess) use version of service.

i have able call "http://api.mydomain.com/v1" instead of previous url. have .htaccess in v1 folder this:

 api   |__ v1        |___ .htaccess        |___ public_html                     |____ .htaccess 

the question should .htaccess contain make redirect ? after redirecting trigger .htaccess public_html ?

i tried use rewriterule ^(/)?$ public_html [l] doesn't work.

edit:

the api folder localized in host home folder (the subdomain points api folder only) :

 home   |__api       |__ v1            |___ public_html                         |____ .htaccess 

try use following source code:

rewriteengine on rewriterule ^$ /v1 [l]