When echoing out html tags the output prints out everything

I want to apply the html tags to the variable.

Code: echo '<strong>'.$message['sender'].' Sent'.'</strong>';

Output: <strong>The actual message Sent</strong>

Desired output: The actual message Sent

How can i apply the strong class to the $message variable?

Full context code::

<textarea name="message" disabled  rows="6"  style="resize:none;" placeholder="Loading...">
<?php
    $messages = get_msg();
    foreach($messages as $message){
        echo '<strong>'.$message['sender'].' Sent'.'</strong>';
        echo $message['message'].'<br/><br/>';
    }

    if(isset($_POST['send'])){
        if(send_msg($_POST['sender'],$_POST['message'])){
            echo 'Message Sent.';
        }else{
            echo 'Message failed to send';
        }
    }
?>
</textarea>

via Chebli Mohamed