JavaScript close already open div

Question

I have given each of my div containers a unique id and some javascript. So I can click to Show/Hide each recipe on the page i'm looking at, but I would like to close any already open div via JavaScript when a new one is opened. I've included some extracted code rather than pasting the entire document as it's huge, below is also the live url:

*update - the <?=$counter_recipes;?> is just producing a unique number. the $i++ method and all further up the page.

Live url - http://bit.ly/1hQuzRI

    <h3 class="box2-title"><?php echo $row_rsCatalogue['pageTitle']; ?></h3>
<a style="color:#000" class="show_hide<?=$counter_recipes;?>">Show/hide</a>

<script type="text/javascript">
$(document).ready(function(){
$("#box_to_show<?=$counter_recipes;?>").hide();
$(".show_hide<?=$counter_recipes;?>").show();

$('.show_hide<?=$counter_recipes;?>').on('click',function(){
$("#box_to_show<?=$counter_recipes;?>").slideToggle();
});

});
</script>
<div class="box2-content" id="box_to_show<?=$counter_recipes;?>">
    <p><?php echo $row_rsCatalogue['pageSubTitle']; ?></p>
    <?php
        if ($row_rsCatalogue['pageId']){
            $rsPriceMatrix = $db->select('pageOption',array('pageId'=>$db->mes($row_rsCatalogue['pageId'])),array('sort'=>'ASC','name'=>'ASC'));
            $ingredients = '';
            while ($row_rsPriceMatrix = $rsPriceMatrix->get_row_assoc()){ 
                $ingredients .= $row_rsPriceMatrix['name'].', ';
            }
            $ingredients = rtrim($ingredients,', ');
            echo '<p>'.$ingredients.'</p>';
        }

    ?>

I can paste more if needed.

Answer 1

Based on your code:

$('.show_hide<?=$counter_recipes;?>').on('click',function(){
    //Hide open divs!
    $("[id^=box_to_show]:visible").slideUp();

    //slide down
    $("#box_to_show<?=$counter_recipes;?>").slideToggle();
});

A much much easier way is to give a common class to your divs that open and close, then just call $(".someClass:visible").slideUp(); at the beginning of the function.