<?php
$input = array('INPUT_1'=>array(74,69,189,155),'INPUT_2'=>array(45,1,10));
echo "****ENTRADA****".PHP_EOL;
print_r($input);

$out = array();

foreach($input as $key => $in){
	for($i = 0; $i < sizeof($in); $i++){
		$out[$key][$i] = $in[$i];
	}
}
echo "****SAÍDA****".PHP_EOL;
print_r($out);