<?php /* this is the data im given, the number of sets will not always be 2, could be more, or could just be 1 */ $set[1] = array( array('id'=>1,'title'=>'Red','inc'=>0), array('id'=>2,'title'=>'Blue','inc'=>2.5), array('id'=>3,'title'=>'White','inc'=>3), ); $set[2] = array( array('id'=>4,'title'=>'Small','inc'=>0), array('id'=>5,'title'=>'Large','inc'=>.5), ); // this the array i need to end up with $new_set = array( array ('title' => 'Red Small', 'inc'=>0, 'id'=>array('4','1') ), array ('title' => 'Red Large', 'inc'=>.5, 'id'=>array('5','1') ), array ('title' => 'Blue Small', 'inc'=>2.5, 'id'=>array('5','2') ), array ('title' => 'Blue Large', 'inc'=>3, 'id'=>array('5','2') ), array ('title' => 'White Small', 'inc'=>3, 'id'=>array('5','3') ), array ('title' => 'White Large', 'inc'=>3.5, 'id'=>array('5','3') ), );?>