My xDebug v2.2.3 for PHP 5.5 completely ignores souce code behind Phalcon native code, like controllers, models, views. Only bootstrap file and method called from there are available.
Here is my xDebug configuration in php.ini:
[XDebug]
zend_extension = "C:\xampp\php\ext\php_xdebug.dll"
xdebug.profiler_append = 0
xdebug.profiler_enable = 1
xdebug.profiler_enable_trigger = 0
xdebug.profiler_output_dir = "C:\xampp\tmp"
xdebug.profiler_output_name = "cachegrind.out.%t-%s"
xdebug.remote_enable = 0
xdebug.remote_handler = "dbgp"
xdebug.remote_host = "127.0.0.1"
xdebug.trace_output_dir = "C:\xampp\tmp"
you should install Xdebug 2.2.6. it is fixed now, and works like magic