php - Access array of array smarty -

i have got multidimensional array.

 [["a1",[["passed",432],["failed",0],["blocked",0],["not_run",0]]],["a2",[["passed",118],["failed",2],["blocked",0],["not_run",0]]],["a3",[["passed",332],["failed",2],["blocked",5],["not_run",0]]],["learning",[["passed",358],["failed",1],["blocked",0],["not_run",0]]],["a4",[["passed",1923],["failed",7],["blocked",11],["not_run",0]]],["a5",[["passed",93],["failed",0],["blocked",0],["not_run",0]]]]  

where a1,a2,a3,a4, keys array.

i have tried

{foreach from=$new_data item=item} <h1>{$item.[0]}</h1> {/foreach} 

but got nothing. how can access above array? there other way apart using foreach loop?

expected result: key: a1  value: [["passed",93],["failed",0],["blocked",0],["not_run",0]] other keys too.  

foreach ($a $a_new=>$a_array) {       foreach ($a_array $a_new_a) {            echo $a_new_a;       }   }  

@anubhav have learn multidimensional array how it's work, need use 2 each loop accessing data