I found this on internet when i need something to shorten link... This is class but its not problem to create cakephp component... (i can post this one too if anyone want it)

NumberConverter.php

<?php 

class Converter {
	
	public function convert ($number = null) {
		$codeset = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
		$base = strlen($codeset);
		$n = $number;
		$converted = "";

		while ($n > 0) {
		  $converted = substr($codeset, ($n % $base), 1) . $converted;
		  $n = floor($n/$base);
		}

		return $converted; //return converted value
	}
	
	public function deconvert ($conv = null) {
		$codeset = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
		$base = strlen($codeset);
		$converted = $conv;
		$c = 0;
		for ($i = strlen($converted); $i; $i--) {
		  $c += strpos($codeset, substr($converted, (-1 * ( $i - strlen($converted) )),1)) 
				* pow($base,$i-1);
		}
		
		return $c;
	}
}

$converter = new Converter();

// convert number
echo $converter::convert(15000007); // returns 10WbB

echo $converter::deconvert('10WbB'); // will return 15000007