logging a structure

I have an array of two structures that have "arrived" from a remote application. Looking at one of the two structures I have:

$data = array(
   'task1' => $Arr[0].Task_0,
   'task1_percent' => $Arr[0].Perc_time_0,
   'task2' => $Arr[0].Task_1,
   'task2_percent' => $Arr[0].Perc_time_1,
   'task3' => $Arr[0].Task_2,
   'task3_percent' => $Arr[0].Perc_time_2,
   'task4' => $Arr[0].Task_3,
   'task4_percent' => $Arr[0].Perc_time_3,
   'task5' => $Arr[0].Task_4,
   'task5_percent' => $Arr[0].Perc_time_4,
   'task6' => $Arr[0].Task_5,
   'task6_percent' => $Arr[0].Perc_time_5,
   );


This is not working correctly. When I look at $data I see that it task1 has the string "Task_0" instead of the value of Task_0. I am looking to log all the values into a table. My table has the structure attached. What is the easy way to do this? I realize that once I get it into the array I need to use $this->db->insert('activity_log',$data);

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