I want to load users with profile2 fields as a custom function like:

function mytheme_getCandidatesHome() {    $  type = 'candidata';    $  users = db_select('users', 'u')            ->fields('u', array('uid'))            ->range(0,8)            ->orderRandom()            ->execute()            ->fetchAll();    $  str = '<!--<ul id="carousel_inner">--><ul>';   foreach($  users as $  u) {      $  profile_data = profile2_load_by_user($  u->uid, $  type);      $  str.= '<li class="mmmd-candidate-item">';       $  str.= '<div class="image">';         $  image = (!empty($  profile_image)) ? '/sites/default/files/'.$  profile_image : mmmd_get_noimage_profile();         $  str.= '<div style="background:url('.$  image.') no-repeat; background-size:cover;" class="profile-image"></div>';       $  str.= '</div>';       $  str.= '<div class="data">';         $  str.= '<div class="name"> '.ucwords(mb_strtolower($  profile_name)).'</div>';         $  str.= '<div class="title">'.((!empty($  u->field_candidata_postulacion)) ? $  u->field_candidata_postulacion : '---').'</div>';         $  str.= '<div class="location">'.((!empty($  u->field_candidata_lugar_postul)) ? $  u->field_candidata_lugar_postul : '---').'</div>';       $  str.= '</div>';     $  str.= '</li>';    }    $  str.= '</ul>';    print $  str; } 

And why profile2_load_by_user($ u->uid, $ type) doesn’t work? Please help! The function is running on template.php