I have this code on ads manger default list page . php

if (isset($content->images[0])) {
$img = JURI_IMAGES_FOLDER."/".$content->images[0]->thumbnail;
} else if ($this->conf->nb_images > 0) {
$img = ADSMANAGER_NOPIC_IMG;
}
?>


<tr class="<?php echo $classcontent;?> trcategory_<?php echo $content->catid?>">
<td>
<div class="row top10">
<div class="col-md-4">
<a href="<?php echo $linkTarget ?>"><img src="<?php echo $img?>" alt="<?php echo htmlspecialchars($content->ad_headline) ?>" class="img-responsive" /></a>
</div>
<div class="col-md-8">
<?php echo '<a href="'.$linkTarget.'">'?><h3><?php echo htmlspecialchars($content->ad_headline);?></h3></a>
<?php if(!isset($this->conf->display_category_list_label) || $this->conf->display_category_list_label == 1): ?>
<span class="adsmanager-cat"><?php echo "(".$content->parent." / ".$content->cat.")"; ?></span>
<?php endif; ?>
<p><?php
$content->ad_text = strip_tags(str_replace ('<br />'," ",$content->ad_text));
$af_text = JString::substr($content->ad_text, 0, 50);
if (strlen($content->ad_text)>50) {
$af_text .= "[...]";
}
echo htmlspecialchars($af_text);
?></p>
</div>
</div>

You provided me a condtion to add in adsmanager list page and said above the mentioned code add that condition.

On my page i am not able to find this code, My code is different

I am confused . I used the code llike below
<?php
if(!($content->catid == 1 || $content->catid == 53 || $content->catid == 14)) {

<div class="col-md-4">
<a href="<?php echo $linkTarget ?>"><img src="<?php echo $img?>" alt="<?php echo htmlspecialchars($content->ad_headline) ?>" class="img-responsive" /></a>
</div>
}
?>


but see the results