public static function newInstance()
 {
     if (!self::$instance instanceof self) {
         self::$instance = new self();
     }
     return self::$instance;
 }
function GetPageTitle()
{
    $detail = ModelSeoPage::newInstance()->getAttrByPageId(osc_static_page_id());
    return isset($detail['seo_title']) ? $detail['seo_title'] : false;
}
          <div class="cat-elem keywords"><?php 
_e('Meta Keywords', 'all_in_one');
?>
</div>
          <div class="cat-elem edit"></div>
          <div class="cat-elem view"></div>
        </div>

        <?php 
osc_reset_static_pages();
?>
        <?php 
while (osc_has_static_pages_seo()) {
    ?>
          <?php 
    $detail = ModelSeoPage::newInstance()->getAttrByPageId(osc_static_page_id());
    ?>

          <div class="cat-row">
            <div class="cat-elem id"><?php 
    echo osc_static_page_id();
    ?>
</div>
            <div class="cat-elem name"><?php 
    echo osc_static_page_title();
    ?>
</div>
            <div class="cat-elem titl"><input type="text" name="seo_title<?php 
    echo osc_static_page_id();
    ?>
" id="seo_title" value="<?php