<form id="form1" action="<?php echo htmlspecialchars(basename($_SERVER['REQUEST_URI'])); ?>" method="post">
    <div style="background-color:lightblue" class="form-group <?php echo (!empty($answer_err)) ? 'has-error' : ''; ?>">
        <label><?php echo $question; ?></label>
        <input type="text" name="answer[]" class="form-control" value="<?php echo $answer; ?>">
        <span class="help-block"><?php echo $answer_err;?></span>
        <input type="hidden" name="consideration_no[]"  value="<?php echo $consideration_no; ?>"/>
        <input type="hidden" name="dg_no" value="<?php echo $dg_no; ?>"/>
    </div>
    <input type="Submit" name = "$consideration_no[]" class="btn btn-primary" onclick="submitForms()" value="Submit">
    <a href="javascript:history.go(-1)" class="btn btn-default">Cancel</a>
   </form>
</div>



  <form id="form2" action="<?php echo htmlspecialchars(basename($_SERVER['REQUEST_URI'])); ?>" method="post">
    <div class="form-group <?php echo (!empty($answer_err)) ? 'has-error' : ''; ?>">
        <label><?php echo $question; ?></label>
        <input type="text" name="answer[]" class="form-control" value="<?php echo $answer; ?>">
        <span class="help-block"><?php echo $answer_err;?></span>
        <input type="hidden" name="consideration_no[]" value="<?php echo $consideration_no; ?>"/>
        <input type="hidden" name="dg_no" value="<?php echo $dg_no; ?>"/>
    </div>
    <input type="Submit" name = "$consideration_no[]" class="btn btn-primary" onclick="submitForms()" value="Submit">
    <a href="javascript:history.go(-1)" class="btn btn-default">Cancel</a>
   </form>
</div>



<input type="button" value="Submit All!" onclick="submitForms()" />
<script>
submitForms = function(){
    document.getElementById("form1").submit();
    document.getElementById("form2").submit();
}
</script>