-Checking- {sCity}/{sCategory} --> #^/([a-z]{1})/(.+?)/(.+?)(?:/|$)# : /a/13047632/classes--<pre>Array
(
    [0] => /a/13047632/classes
    [1] => a
    [2] => 13047632
    [3] => classes
)
</pre><!-- 0.00199794769287 seg. -->