MVC Sending Values to Form

I have been making a site to learn about MVC, I am trying to add a function to the update option. At the moment I have two buttons on each row (one to delete and one to update), when the update button is pressed a form to update the row appears on the right of the screen.

I am trying to pre-populate the form when the user presses the update the button but I dont know how to do that within an MVC. Should I create a function that does this or should I have some PHP at the top of the form to pre-populate?

Any help or advice will be great

Update Form to be pre-populated

<h2>Update Item!</h2>
    <h4>Fill in the form to update an entry.</h4>
    <form action="index.php" method="post">
        <fieldset>
            <input id='action' type='hidden' name='action' value='updateItem' />
            <p>
                <label for="fTitle">Title</label> <input type="text"
                    id="fTitle" name="fTitle" placeholder="title"
                    maxlength="25" required />
            </p>
            <p>
                <label for="fPrice">Price</label> <input type="text"
                    id="fPrice" name="fPrice" placeholder="price"
                    maxlength="25" required />
            </p>
            <p>
                <label for="fDescription">Description</label> <input type="text"
                    id="fDescription" name="fDescription" placeholder="description"
                    maxlength="500" required />
            </p>

            <p>
            <div class="form-group">
                <div class="controls">
                    <button type="submit" class="btn btn-success">Update</button>
                </div>
            </div>
            </p>
        </fieldset>
    </form>

Update button in the View receiving the row ID for the button

            $update = file_get_contents( "templates/updateButton.php");
            $HTMLItemList = "";
            foreach ( $this->model->itemList as $row ) 
                    $HTMLItemList .= "<li><strong>" . $row ["title"] . ": </strong>" . "€" .$row ["price"] . "<blockquote>" . 
                        $row ["description"] .  " " . str_replace("value2replace", $row['id'], $delete) . 
                        str_replace("value2replace", $row['id'], $update) . "</blockquote></li>";

Update Button

<form action="index.php" method="post">
        <fieldset>
            <input id='action' type='hidden' name='action' value='updateStart' />
            <div class="form-group">
                <div class="controls">
                    <input type="hidden" id="fId" name="fId" value="value2replace"> 
                    <input type="submit" class="btn btn-success" value="Update" />
                </div>
            </div>
        </fieldset>
    </form>