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I have two tables, a scale with schedules and a related one called agenda.
tabela escala
id_escala
hr_inicio
tabela agenda
id_agenda 
id_escala
hr_agendamento
I want to record in the hr_schedule field in the schedule table all times of the scale table I list. I am managing to record the id perfectly, but the times are being recorded like this 00:00:00. 
My code:
<?php include("conectar.php");?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body>
<?php
    if (isset($_POST['enviar'])){       
        foreach($_POST['id_escala'] as $indice => $valor){
        $hr_agendamento   = $_POST['hr_agendamento'.$valor];
            $inserir = "INSERT INTO agenda
            (id_escala, hr_agendamento) VALUES ('".$valor."','".$hr_agendamento."')" 
            or die(mysql_error());
            mysql_query($inserir) or die(mysql_error());
        }
    }   
    // consulta do select de Serviços
    $selec = "SELECT * FROM escala limit  2";
    $exec = mysql_query($selec) or die(mysql_error());
    // Lista dados do checkbox 
?>
<form id="form1" action="" enctype=" multipart/form-data" method="post">
<?php
    while($dados = mysql_fetch_assoc($exec)){
        $valor_id_escala        =  $dados['id_escala'];
        $valor_hr_inicio     =  $dados['hr_inicio'];
?>
    <input style="margin-left:30px" name="id_escala[]" type="checkbox" value="<?php echo $valor_id_escala ?>"/>
    <input type="hidden" name="hr_agendamento" value="<?php echo $valor_hr_inicio ?>" />
      <?php echo $valor_hr_inicio ?></br>
<?php 
    } 
?>
    <input type="submit" name="enviar" value="gravar" />
</form>
what kind of data in the hr_start and hr_scheduling column?
– user60252