Using directores for each domain using htaccess - apache

Question

I have a host and some domains. I want use a directory for each domain. Unfortunately my host dose't support vhosts. I made .htaccess file in root to redirect every domain request to it own directory.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]
RewriteCond %{HTTP_HOST} domain1\.com [NC]
RewriteCond %{REQUEST_URI} ^/$
RewriteRule ^(.*)$ /domain1/$1 [L]
RewriteCond %{HTTP_HOST} domain2\.com [NC]
RewriteCond %{REQUEST_URI} ^/$
RewriteRule ^(.*)$ /domain2t/$1 [L]
</IfModule>
It worked well and my site accessabe with "http://domain1.com" address. I try to use CodeIgniter as my sites framework.
So I configure base-url in CI config file to "http://domain1.com/domain1/" but it worked for main page only and when I request another controller like "http://doamin1.com/somecontroller", the page not found.
Also I setup .htaccess in site directory as follow.
<IfModule mod_rewrite.c>
Options +FollowSymLinks
RewriteEngine On
RewriteBase /domain1
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
RewriteRule ^$ index.php [L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond $1 !^(index\.php|robots\.txt|favicon\.ico)
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
How can I do this job so that browser addressbar do't show directory like
"http://doamain1.com/domain1/somecotroller" (this form is working).
Tanks everybody.
UPDATE
My routes.php.
$route['default_controller'] = 'main';
$route['404_override'] = '';
$route['translate_uri_dashes'] = FALSE;

Answer 1

I after some tests got the answer that I need.
I change root .htaccess like this
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]
RewriteCond %{REQUEST_URI} !^/domain2/
RewriteCond %{HTTP_HOST} ^(www\.)?domain2\.
RewriteRule ^(.*)$ /domain2/$1 [L]
RewriteCond %{REQUEST_URI} !^/domain1/
RewriteCond %{HTTP_HOST} ^(www\.)?domain1\.
RewriteRule ^(.*)$ /domain1/$1 [L]
</IfModule>
And every .htaccess in domain directory to as follow
<IfModule mod_rewrite.c>
Options +FollowSymLinks
RewriteEngine On
RewriteBase /domain1
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /index.php?/$1 [L]
</IfModule>
Also change config.php file base-url to "http://domain1.com/"