<?php

$years = array("2000", "2001", "2002", "2003", "2004", "2005", "2006", "2007", "2008", "2009");
$current = "current\n";
$numOfYears = count($years) - 1;

foreach ($years as $key => $year){
	$current.= $year. "=";
	
	foreach($years as $subKey => $subYear){
		//Отрисовка
		if($key == 0 or $key == 1){
			if($subKey > 4)
			continue;
		}elseif($key == $numOfYears or $key == ($numOfYears - 1)){
			if($subKey < $numOfYears - 4)
			continue;
		}else{
			if(($key + 2) < $subKey || ($key - 2) > $subKey)
			continue;
		}
		// Выводим год
		if($year == $subYear){
			$current.="(". $subYear.")";
		}else{
			$current.= $subYear. " ";
		}
	}
	$current.= "\n";
}
echo $current;