Example of the problem

gistfile1.txt

$nav = array(
  	     array(
			 'item1',
			 'item2',
			 'item3'
		     ),
		    array(
			'item1',
			'item2',
			'item3'
		    ),
		    array(
			'item1',
			'item2',
			'item3',
			'item4',
			'item5',
			'item6',
		    ), 
		    array(
			'item1',
			'item2',
			'item3',
			'item4',
			'item5',
			'item6',
		    )
		);
		
		//The best way to diviy up the array above is to take position array[0], 
                //and array[1] and put those in column 1.  
		//Take array[2] and put in column 2, take array[3] and put in column 3
		
		$nav = array(
		      array(
			'item1',
			'item2',
			'item3',
			'item4',
			'item5',
			'item6',
		    ),
		     array(
			 'item1',
			 'item2',
			 'item3'
		     ),
		    array(
			'item1',
			'item2',
			'item3'
		    ),
		    array(
			'item1',
			'item2',
			'item3',
			'item4',
			'item5',
			'item6',
		    )
		);
		
		//The best way to diviy up the array above is to take position 
		//array[0] for the colum 1. 
		//array[1] and array[2] put those in column 2.  
		//array[3] and put in column 3