Find current 'numerical' position value of array

I'm trying to find out the current 'numerical' position value of an array. Here is the code I have at the moment:

$menu1 = array('1'=>'Entertainment', '2'=>'Venues', '3'=>'Transport', '4'=>'Catering', '5'=>'Decorations', '6'=>'Essentials');

Code (markup):

foreach ($menu1 as $value1 => $index1)
{
	//do something here
	foreach ($cat as $index => $value)
	{
		if ($cat[$index][0] == key($menu1) && $cat[$index][1] == $value1)
		{
			//do something here					
		}
	}
}

Code (markup):

Basically I need the value of $cat[$index][0] to match the current value of the $menu1 array as it is being accessed in the FOR loop. For example in the first cyle, $menu1 should be initialised to '1'=>'Entertainment' and hold the value of 1.

 

At the moment, key($menu1) doesn't seem to be matching up with the assigned values in the $menu1 array

 

It is impossible for me to understand any line of this pointless code, sorry.

 

and.. where is your $cat array...?
(before call foreach function, you need varible with array type)