<?php
$cats_query = mysql_query(" SELECT * FROM `cats` ORDER BY `cat_id` asc LIMIT 0,4 ") or die ("MySQL Error");
while($rowcats=mysql_fetch_object($cats_query)){
     echo"<h3 class='blocktitle'>جديد ".$rowcats->cat_name."</h3>";
          $topics_query = mysql_query(" SELECT * FROM `pages` where cat_id=".$rowcats->cat_id." ORDER BY `page_id` desc LIMIT 0,5 ") or die ("MySQL Error");
        echo"<ul class='last-topics'>";
        while($rowtopics=mysql_fetch_object($topics_query)){
        echo "<li><a href='page.php?page_id=$rowtopics->page_id'>".$rowtopics->page_name."</a></li>";
               }
  echo"</ul>";  
}
?>

$row['cat_name']

<?php
    function cats(){
        $query = mysql_query("SELECT * FROM `cats` ORDER BY `cat_id` asc");
            while( $row= mysql_fetch_array( $query ) ){
                $list[ ] = $row;
            }
        return (isset($list)) ? $list : null;  
    }
     
    function articles($cat_id){
        $query = mysql_query("SELECT * FROM `pages` WHERE `cat_id` = {$cat_id} ORDER BY `page_id` DESC LIMIT 0,5");
            echo"<h3 class='blocktitle'>جديد ".$row['cat_name']."</h3>";     
            while( $row = mysql_fetch_array( $query ) ){
                $list[ ] = $row;
            }
        return (isset($list)) ? $list : null;  
    }
    echo"<ul id='mainmenu'>";
    foreach ((array) cats($page_id) as $cat) {
        echo"<ul id='mainmenu'>";
        foreach ((array) articles($cat['cat_id']) as $row) {
        echo"<li><a href='page.php?page_id=".$row['page_id']."'>".$row['page_name']."</a></li>";
        }
        echo"</ul>"; 
    }
?>

<?php
    function cats(){
        $query = mysql_query("SELECT * FROM `cats` ORDER BY `id` DESC");
            while( $row = mysql_fetch_array( $query ) ){ 
                $list[ ] = $row;
            }
        return (isset($list)) ? $list : null;	
    }
    
    function articles($cat_id){
        $query = mysql_query("SELECT * FROM `articles` WHERE `cat_id` = {$cat_id} ORDER BY `id` DESC");
            while( $row = mysql_fetch_array( $query ) ){ 
                $list[ ] = $row;
            }
        return (isset($list)) ? $list : null;	
    }
    
    foreach ((array) cats($page_id) as $cat) {
        foreach ((array) articles($cat['id']) as $row) {
            echo $row['title'];
        }  
    }
?>