Lite con array :-)

[clasku]

provalo, non l'ho testato

$dir = dirname(__FILE__)."/file/*.txt"; 

$out_array = array();
foreach(glob($dir) as $file) {
    $fp = fopen($file,'r'); 
    $count = 1; 
       while (($data = fgetcsv($fp,0,'|')) !== FALSE) { 
           $out_array[$data[0]][] = $data[$count];
           $count++;
   } 


}  
print_r($out_array);