Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A ladder in a dream indicates the means of elevation in religion and worldly life. Climbing a ladder is gaining authority, a strong argument, or a blessed journey. Descending from it is dismissal from a position or a decline in status. An unknown ladder indicates a long life.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
A ladder indicates travel, health for the sick, or drawing closer to Allah with righteous deeds. Whoever sees himself climbing a wooden ladder will gain authority from a hypocritical man. Whoever falls from a ladder will fail in his endeavor.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
A ladder is interpreted as safety, victory, and high status. Ascending it is elevation, and descending it is a decline. A broken ladder indicates illness or death.