CKeditor的分页问题

$strArr = preg_split('/<div[^>].*page-break-after:\salways(;)?[^>].*>([^>].*)<\/div>/',$_POST['descr'],null,PREG_SPLIT_NO_EMPTY);
$count = count($strArr);
if($count>1){
	$outstr   = '<div id="page_break">'; 
	foreach($strArr as $_k=>$_v){
		if($_k<=0){
			$outstr .='<div id="page_'.($_k+1).'">'.$_v.'</div>'; 
		}else{
			$outstr .='<div id="page_'.($_k+1).'" class="collae">'.$_v.'</div>'; 
		}
	}
	$outstr .='<div class="num">';
	for($i=0;$i<$count;$i++){
		$outstr .='<li>'.($i+1).'</li>';
	}
	$outstr .="</div></div>";
	$_POST['description'] = $outstr;
}