如何使用php在ul里面使用ul li动态下拉？

I have a ul li with parentid . I want all ul li with parentid but I'm getting multiple loops. The first steps and last are under same parentid.

<ul class="section-list"> 
<?php   
    if(count($outArrResults)>0){    
        for($i=0; $i<count($outArrResults); $i++){
            ?>
                <li class="o-view">
                    <a href='javascript:void(0);'>
                        <h4 class="tit-section xsm">
                            <?php echo isset($outArrResults[$i]['cName']) ?$outArrResults[$i]['cName'] : '';?>
                        </h4>
                    </a>
                    <ul>
                        <?php
                            for($s=0; $s<count($outArrResults); $s++){
                                $contentSlugUrl = isset($outArrResults[$s]['conSName']) ? $outArrResults[$s]['conSName']:'';
                                $contentMenuTitle = isset($outArrResults[$s]['conMTitle']) ? $outArrResults[$s]['conMTitle']:'';
                                if($contentMenuTitle!=''){
                                    ?>
                                        <li>
                                            <a href='<?php echo $config['LIVE_URL'].'courses/'.$pAction1.'/'.$pAction2.'/'.$contentSlugUrl;?>'>
                                                <span><?php echo $contentMenuTitle;?></span>
                                            </a>
                                        </li>
                                    <?php
                                }
                            }
                        ?>
                    </ul>
                </li>
            <?php
        }
    } else {
        echo "No Results";
    }
?>