I have tryed to install kloxo 6.5.0 in centOS 6.5 x64 and I get the same error:
/usr/local/lxlabs/kloxo/install/setup.sh: line 172: lxphp.exe: command not found
[root@server tmp]# cat /etc/*release; uname -m; dir -l /etc/yum.repos.d
CentOS release 6.5 (Final)
CentOS release 6.5 (Final)
CentOS release 6.5 (Final)
x86_64
total 36
-rw-r--r-- 1 root root 1926 Nov 30 2013 CentOS-Base.repo
-rw-r--r-- 1 root root 638 Nov 30 2013 CentOS-Debuginfo.repo
-rw-r--r-- 1 root root 630 Nov 30 2013 CentOS-Media.repo
-rw-r--r-- 1 root root 4528 Nov 30 2013 CentOS-Vault.repo
-rw-r--r-- 1 root root 9142 Feb 14 17:59 mratwork.repo
-rw-r--r-- 1 root root 219 May 14 2014 vz.repo
Sorry for the delay in my answer.