RCCWP_WritePostPage::attributesBoxContentPost PHP Method

    public static function attributesBoxContentPost($post)
    {
        global $wpdb;
        global $mf_domain;
        $single_panel = FALSE;
        $panel_id = get_post_meta($post->ID, "_mf_write_panel_id", TRUE);
        if ($panel_id) {
            $panel = RCCWP_CustomWritePanel::Get($panel_id);
        }
        ?>
    <p><strong><?php 
        _e('Write Panel');
        ?>
</strong></p>
    <label class="screen-reader-text" for="parent_id"><?php 
        _e('Write Panel');
        ?>
</label>
    <?php 
        // get a list of the write panels
        $customWritePanels = RCCWP_CustomWritePanel::GetCustomWritePanels();
        ?>
    		<select name="rc-cwp-change-custom-write-panel-id" id="rc-cwp-change-custom-write-panel-id">
          <option value="-1"><?php 
        _e('(None)', $mf_domain);
        ?>
</option>
    		<?php 
        $items = array();
        foreach ($customWritePanels as $panel) {
            $selected = $panel->id == $panel_id ? 'selected="selected"' : '';
            $allow = $panel->type == "post";
            if ($panel->single && $panel->id != $panel_id) {
                // check to see if there are any posts with this panel already. If so, we can't allow it to be used.
                $sql = $wpdb->prepare("SELECT COUNT(*) FROM {$wpdb->postmeta} WHERE {$wpdb->postmeta}.meta_value = %d AND {$wpdb->postmeta}.meta_key = %s", array($panel->id, "_mf_write_panel_id"));
                $count = $wpdb->get_var($sql);
                $allow = $count == 0;
            }
            if ($allow) {
                // cannot change to "single" panels
                ?>
    			<option value="<?php 
                echo $panel->id;
                ?>
" <?php 
                echo $selected;
                ?>
><?php 
                echo $panel->name;
                ?>
</option>
    		  <?php 
            }
        }
        ?>
    		</select>
    <?php 
    }