次の配列があります。(var_dump出力)これらの同じキー要素を単一の配列に結合したいと思います。それ、どうやったら出来るの?
 array (size=3)
      'totals' => 
        array (size=3)
          0 => 
            array (size=1)
              'total' => string '4' (length=1)
          1 => 
            array (size=1)
              'total' => string '50' (length=2)
          2 => 
            array (size=1)
              'total' => string '44' (length=2)
      'styles' => 
        array (size=3)
          0 => 
            array (size=1)
              'style' => string '11' (length=2)
          1 => 
            array (size=1)
              'style' => string 'aaa' (length=3)
          2 => 
            array (size=1)
              'style' => string 'bb' (length=3)
      'colors' => 
        array (size=3)
          0 => 
            array (size=1)
              'color' => string '11' (length=2)
          1 => 
            array (size=1)
              'color' => string 'ccc' (length=3)
          2 => 
            array (size=1)
              'color' => string 'ddd' (length=3)
最終的な出力は次のようになります。
      'totals' => 
        array (size=3)
          0 => 
            array (size=1)
              'total' => string '4' (length=1)  
              'style' => string '11' (length=2)
               'color' => string '11' (length=2)
     'styles' => 
        array (size=3)
          1 => 
            array (size=1)
               'total' => string '50' (length=2)   
                'style' => string 'aaa' (length=3)
                 'color' => string 'bb' (length=3)  
      'colors' => 
        array (size=3)
          2 => 
            array (size=1)
               'total' => string '44' (length=2)
                'style' => string 'ccc' (length=3)
                 'color' => string 'ddd' (length=3)