I think the solution will depend on how you need to access them. From looking at the directory structure I'd assume that the site root is the www directory. So when you access the site like:
http://www.yoursite.com/ - www is mapped to / (although it's hard to know, it might also be mapped to public so that the stats are accessible from the web.) You will not be able to access anything in the php directory using a URL like
http://www.yoursite.com/dev/php/login.php because those files are actually in /conf/php.
Now, if the server's security is poor you might be able to request them like
http://www.yoursite.com/../../conf/php/login.php but that's not a good idea for a number of reasons.
What I would think about trying is to make a symlink to the /conf/php directory in your www directory. If Apache is set up to follow symlinks that may work for you. I'd guess that this what the arrow icon next to awstats in the public directory is telling you - that it's a symlink to /conf/awstats.
Failing that, I would try to modify the httpd.conf to create another mount point for those files to which you can redirect the user.
You might also be able to include the files from another PHP files that you place in the www directory - maybe there's a way to wrap the functionality like that.
If you're able to you could try creating a .htaccess file in the www directory. I forget how you do it but you can set a custom php value using the "php_value" keyword - it's possible you can create a pointer to the directory. The same is also true of the global settings in php.ini. Even if you succeed with this, you'd probably still have to reference these pages from another page so it's not really a solution - I've mentioned it in case it sparks an idea from someone else.
These things all assume that the web server's account has access to these files and/or that you have permissions to modify httpd.conf or php.ini if you intend to try either of those.
If you want to find out if PHP is installed on the web server you can use Netcraft's (
http://www.netcraft.com/) server profile - if the server reports details on itself. Alternately, you can create a simple PHP page that looks like:
Put a file with that code in it and a .php extension in the www directory and try hitting it with a browser. If PHP is installed, you should get a lot of PHP configuration information.