I want to know how I can schedule a dynamic(auto populated data) function to auto run everyday at saved time?

Let's say I have a form that once the button is clicked it sends the data to the function, which the posts the data. I simply want to automate that so that I don't have to press the button.

<ul>
    <?php 
    foreach($Class->retrieveData as $data)
    {
        <form method="post" action="">
            <li>
                <input type="hidden" name="name">'.$data['name'].'<br/>
                <input type="hidden" name="description">'.$data['description'].'<br/>
                <input type="submit" name="post_data"  value="Post">
            </li>
        </form>
    }
    ?>
</ul>

Now, the form will pass the data to the function.

if(isset($_POST['post_data'])) // if post_data button is clicked then it runs myFunction()
{
    myFunction();
}

myFunction()
{
    $name        = $_POST['name'];
    $description = $_POST['description'];
}

I tried doing the following but the problem is that Cron Job can only run the whole .php file, and I am retrieving the saved time to run from MySQL.

foreach($Class->getTime() as $timeData)
{
    $timeHour    = $timeData['timeHour'];
    $timeMinute = $timeData['timeMinute'];

    $hourMin    = date('H:i');
    $timeData   = ''.$timeHour.':'.$timeMinute.'';

    if($hourMin == $timeData)
    {
        run myFunction.
    }
}

$hourMin is the current hour:minute which is being matched against a saved time to auto run from Mysql. So if $hourMin == $timeData then the function will run.

How can I run Cron Job to auto run myFunction() if the $hourMin equals $timeData?

So...

List 1 = is to be runned at 10am
List 2 = is to be runned at 12pm
List 3 = is to be runned at 2pm

The 10am, 12pm, 2pm is the $timeHour and $timeMinute that is retrieved from MySQL but based on each list id's.

EDIT

@randomSeed,

1) I can schedule cron jobs.
2) $name and $description will all be arrays, so the following is what I am trying to accomplish.

$name = array(
    'Jon',
    'Steven',
    'Carter'
);

$description = array(
    'Jon is a great person.',
    'Steven has an outgoing character.',
    'Carter is a horrible person.'
);

I want to parse the first arrays from both $name and $description if the scheduled time is correct.

In database I have the following

postDataTime table

+----+---------+----------+------------+--------+
| iD | timeDay | timeHour | timeMinute | postiD |
+--------------------------------------+--------+
| 1  | *       | 9        | 0          | 21     |
|----|---------|----------|------------|--------|
| 2  | *       | 10       | 30         | 22     |
|----|---------|----------|------------|--------|
| 3  | *       | 11       | 0          | 23     |
+----|---------+----------+------------+--------+

iD         = auto incremented on upload.
timeDay    = * is everyday (cron job style)
timeHour   = Hour of the day to run the script
timeMinute = minute of the hour to run script
postiD     = this is the id of the post that is located in another table (n+1 relationship)

If it's difficult to understand..

if(time() == 10:30(time from MySQL postiD = 22))
{
    // run myFunction with the data that is retrieved for that time ex:

    $postiD = '22';
    $name   = 'Steven';
    $description = 'Steven has an outgoing character.';

    // the above is what will be in the $_POST from the form and will be
    // sent to the myFunction()
}

I simply want to schedule everything according to the time that is saved to MySQL as I showed at the very top(postDataTime table). (I'd show what I have tried, but I have searched for countless hours for an example of what I am trying to accomplish but I cannot find anything and what I tried doesn't work.).

I thought I could use the exec() function but from what it seems that does not allow me to run functions, otherwise I would do the following..

$time = '10:30';
if($time == time())
{
    exec(myFunction());
}