Trying to create a schedule for a GYM web - php

Question

I finished my studies but now I need to develop a project and I thought about creating a web app for a gym, but I'm stuck on the schedule module. I need it to get the info from a database like this:
+--------+------------+--------+----------+------+-----------+------------+
| ID_Act | HoraInicio | Dia | Duracion | Sala | DNI_Prof | Dificultad |
+--------+------------+--------+----------+------+-----------+------------+
| 1 | 09:00:00 | LUNES | 45 | 1 | 12345678A | 2 |
| 1 | 09:00:00 | MARTES | 45 | 1 | 12345678A | 3 |
| 1 | 10:30:00 | LUNES | 45 | 1 | 12345678A | 1 |
+--------+------------+--------+----------+------+-----------+------------+
ID_Act: Activity ID
HoraInicio: Start time
Dia: Day
Duración: Duration
Sala: Room
DNI_Prof: Teacher ID
Dificultad: Level
I've been trying to create the whole schedule using a for loop so I don't have to copy&paste 50 rows. I can create the whole schedule with the loop but I can not print the values that I need to have in the proper cell.
This is the code of what I've been trying:
<?php session_start(); ?>
<?php
include("connbd.php");
$consulta="SELECT actividades.nombre AS Actividad, ID_Act, HoraInicio, Dia, Duracion, Sala, Dificultad FROM horarios
JOIN actividades WHERE actividades.id LIKE ID_Act;";
$resultado=mysqli_query($conn,$consulta);
$hora = array("09:00","09:15","09:30","09:45","10:00","10:15","10:30","10:45","11:00","11:15","11:30",
"11:45","12:00","12:15","12:30","12:45","13:00","13:15","13:30","13:45","14:00","14:15","14:30","14:45",
"15:00","15:15","15:30","15:45","16:00","16:15","16:30","16:45","17:00","17:15","17:30","17:45","18:00",
"18:15","18:30","18:45","19:00","19:15","19:30","19:45","20:00","20:15","20:30","20:45","21:00");
?>
<div id=contenidoHorarios class="contenidoHorarios">
<div id=contenidoHorariosTabla class="contenidoHorariosTabla">
<div id=contenidoHorariosTablaHoras class="contenidoHorariosTablaHoras">
<table border="1px" id="contenidoHorariosTablaTabla" class="contenidoHorariosTablaTabla">
<tr>
<th width="5%"></th>
<th width="13.57%">Lunes</th>
<th width="13.57%">Martes</th>
<th width="13.57%">Miércoles</th>
<th width="13.57%">Jueves</th>
<th width="13.57%">Viernes</th>
<th width="13.57%">Sábado</th>
<th width="13.57%">Domingo</th>
</tr>
<?php
foreach ($hora as $horatupla) {
?>
<tr>
<th><?php echo $horatupla; ?></th>
<td id="<?php
while ($row=$resultado->fetch_assoc())
{
$id = $row['ID_Act'];
$horainicio = substr($row['HoraInicio'],0,-3);
$dia = $row['Dia'];
$duracion = $row['Duracion'];
$sala = $row['Sala'];
$dificultad = $row['Dificultad'];
$actividad = $row['Actividad'];
if($dia=='LUNES'){echo $dia . $horatupla;} ?>" rowspan="<?php if($duracion=='15' || $duracion==''){echo '1';} if($duracion=='30'){echo '2';} if($duracion=='45'){echo '3';} ?>"
<?php
if ($horatupla==$horainicio)
{
echo $actividad;
}
}
?>>
</td>
</tr>
<?php } ?>
</table>
</div>
</div>
</div>
I hope you understand what I'm saying, but to help you, I give you a example of what I do want to do (no spam).
http://www.go-fit.es/Horarios/Index