[Merging elements of an multidimensional array together and incrementing value.]

This is simply fantastic, after spending  a day and a half looking up arr_diff_assoc etc in the manual and getting decimated on SO it gets solved in about 15 minutes. Thanks.

[Merging elements of an multidimensional array together and incrementing value.]

I have a multidimensional array like so.
 

Array
(
[0] => Array
(
[0] => Yolo County Sheriff's Home 2008faroo
[1] => http://www.yolosheriffs.com/
[2] => 86
)

[1] => Array
(
[0] => Fremont, Yolo County, California - Wikipedia, the free encyclopediafaroo
[1] => http://en.wikipedia.org/wiki/Fremont,_Yo…
[2] => 11
)

[2] => Array
(
[0] => The Lonely Island - YOLO (feat. Adam Levine & Kendrick Lamar) - YouTubefaroo
[1] => http://www.youtube.com/watch?feature=pla…
[2] => 45
)

What i need to do is find duplicate urls in this array, merge them together and combine the score found at [2]. I have scoured the php manual but I can't seem to find a way to merge the duplicate urls and then add the scores to the remaining url. Would it make it any easier to have it in the format
 

Array
(
[0] => Array
(
[0] => Yolo County Sheriff's Home 2008faroo,
array([0] => http://www.yolosheriffs.com/ ,[1] => 0)
)

?? All suggestions appreciated.I have looked at the manual but i don't have the knowledge at this stage to use the array functions in conjunction with foreach loops to achieve what i need.I